Here to share our experiences and I wanted to start with this and follow up with more over time... My wife and I separated around ten years ago but got back together about 18 months later. Whilst separated I acted out a few fantasies and met couples, and some single women. One of the women became a regular fuck buddy until we got back together. I also met two of the couples several times over many few months too. During our marriage I had previously broached the topic of swinging and threesomes but Jane (my wife) wasn't supportive despite being open to most things. I didn't push it and left it there,  A month or so after getting back together Jane found some evidence of swinging sites on my PC and confronted me. I hadn't hidden anything as I had been single and had just forgotten about the evidence trail. She was far from happy and then began to tell me why she had rebuffed my previous hints at swinging. The reason she didn't appear to be engaged wasn't what I expected  because she had a very promiscuous past, I wasn't aware of, that she didnt feel a need to re-visit...she had participated in girl to girl sex, threesomes and foursomes before I met her. I was all ears when she started telling me. It also explained to me why Jane had a shaved pussy when we met her, as I'd never seen one before and it waa a pleasant surprise when I first slipped my hand down her knickers. Jane, knowing how much the details turned me on, took great pleasure in stringing these accounts out and I've summarised her experiences here….though she emphasised that this was very much behind her and something she didn’t want to discuss when I’d previously suggested experimenting. She’d had two relationships when we were separated and had told me about them. The second relationship had continued up to the point we got back together and they basically met up around child care. She was open enough to tell me that she often came straight from his house minutes before I dropped the kids off and was usuallyfull of his cum after fucking him before heading home.  On top of that, Jane explained that she had started in the first relationship before we had separated when I was still living at home and was planning to move out. She confided in a much older divorced male colleague and ended up seeing him for several months. She would often fuck him before coming home full of his cum, shower and get into bed with me as we weren't having sex but still sleeping together. I had no idea at the time. Whilst training to be a nurse  in the late 1980’s, Jane had met another student called Paula and they got on really well. Jane was single after moving away to start nurse training and her long term boyfriend Nick had gone to uni and their relationship had ended. I knew about Nick as Jane was open about her first proper boyfriend. His parents were away at the weekends so she got lots of sex as a 16/17 year old (much more than the zero sex I was getting)....he also had a big cock too, close to 8 inches long with a large mushroom head, and Jane had kept a polaroid picture of it..though I didn't know until she found it in the loft years later and after some persuasion showed it to me. It was longer than mine, a lot thicker and circumcised! I shouldn't complain as my cock is just under 7 and 3/4 inches with a slender shaft but a decent sized glans much wider than the shaft. It was bigger than all of the husbands' cocks whose wives I fucked and I enjoyed the compliments from the wives in front of their husbands. A kind of bull/cuckold angle emerged with the two couples I met regularly. One night in the nursing home a few of them had been drinking before planning to go out and Jane, being a bit tipsy, had knocked on Paula's door on the way out. Paula invited her in but was still getting ready and Jane waited while they both chatted away. Part way through the conversation Paula dropped her towel and openly walked around naked as she brushed her hair....Jane wasn't unduly surprised until Paula turned around to reveal a smooth shaved pussy directly in front of her face. Paula could see Jane was looking at her pussy and asked if she had seen a shaved pussy before! Jane said she hadn't. Paula then ran her finger between her pussy lips and explained how she loved the smooth feeling and kept it smooth. Jane was quite turned on and told Paula that she'd only ever trimmed her bikini line. Paula then said touch it if you want and before Jane could think Paula grabbed her hand, pressing her palm against the smooth skin. It felt great and Jane said she might try that sometime.  Paula then continued to get ready and they went out. At the end of the evening Paula invited Jane back to her room for a cup of tea as they had drunk enough alcohol. Unbeknown to Jane, Paula had been fantasizing about shaving Jane's pussy all night and while the kettle was boiling came straight out with "if you lie on the bed I'll shave your pussy smooth like mine". Jane was taken aback as she hadn't given it much thought since, but in the spur of the moment was up for it, and still a bit turned on from earlier. Jane's pubic hair was all gone 20 minutes later and her pussy was wet from the delicate sensual touches. Paula moved straight from shaving to licking Jane's pussy and got no resistance. Jane said that the sensation of a tongue on the smooth labia felt great and kept her pussy mostly smooth from then on.....during this session Paula explained that she was bi and had a boyfriend, Paul, who lived and worked in Paula's home town, he  visited her regularly, but Paula explained that she was also fucking one of the other male nurses, Pete. This was a bit of a shock to Jane.  Paula also said that she would also occasionally fuck other guys if she got the opportunity and had fucked a couple of the male nurses on the course but wasn't impressed by their lack of experience. Paul and Pete knew about the set-up and all three of them would often have threesomes when Paul visited the nursing home to stay for the weekend.. Paula would fuck Pete two or three times a week while away from Paul. This was all a big revelation to Jane and all in the time she had just had her first bi experience. Jane had two orgasms that first night and also fingered Paula to an orgasm before they fell asleep snuggled together naked. Other than masturbating, Jane hadn’t had sex for months since splitting up with Nick and this was a big step. They had more sex the following morning too, with Jane’s first bi 69 pussy lick. During the next few months Jane joined Paula and Pete, and also had foursomes with them all when Paul visited. Paul was about 10 years older than Paula, quite tall and muscular. Jane found him quite attractive and loved the attention he gave to her pussy with his mouth and fingers. He could also get hard again quickly after cumming, which she liked. Pete was taller but slimmer with the longer cock. They were both relaxed about contact as Paula would sometimes rub their cocks together as she gave them a blow job. Paul liked to watch Paula being fucked and would often wank slowly as Pete fucked her. Pete seemed to like this, especially when Paula commented on his larger cock. Jane also went to Paula 's home town during a half term break and spent a whole week staying with them in Paul's flat. It was at this point when the whole swinging experience escalated with them spending an entire week as a threesome sleeping and living together, including some bondage, watching porn and taking polaroid pictures. On the last day of the stay, just before they headed back,  Paula woke early in the morning and sneaked out to see her parents, leaving Paul and Jane alone. He came into the kitchen, as Jane had got up with Paula, and they chatted for the next half hour or so while waiting for her to return. Jane hadn't really talked that much to Paul as she usually just joined them for sex. It was during this conversation that it became clear that Paula and Paul's relationship was much more open than she imagined. He explained that he also had a fuck buddy just like Paula had Pete and Paula was ok with that.  In his words she was a married sexually frustrated 40 year old. As he was recounting this to Jane, Paul dropped his dressing gown, grabbed her and fucked her quickly from behind over the kitchen work surface.  After telling Paula when she returned,  he also fucked her too…while being fucked Paula licked Jane's pussy as it still tasted of  his cum. Jane was on the pill to avoid getting pregnant from Paul and Pete, she hadn’t let them fuck her without any protection at first,  but being young and super turned on she let them both fuck her bareback.  This was after watching Paul do sloppy seconds with Paula after Pete had come inside her before him. The next time they all met she asked if they could both come inside her, the boys were really keen and turned on by the prospect. Pete was a heavy cummer (more so than any boyfriend before and since) and Jane straddled him cowgirl, but before he came Paul also slipped his cock into her pussy from behind. It easily slipped in and they both came quickly. Pete pulsating several times with big gushes of cum. Paula moved them out of the way and went down on Jane's spunky pussy prior to snogging Jane with a spunky mouth. I could relate to this as I met a bi couple several times and my condom once split completely, meaning I was basically bareback and we decided to not use any for the rest of the evening. I had my first two cocks in the pussy experience that evening and it's the only experience where I've had multiple erections and ejacualtions in a single session. I was really turned on watching a wife fucked by her partner with my spunk already inside. I was bowled over by the revelations and understood where she was coming from. She had several more boyfriends before we met including going back out with Nick for a while but never told him either. The weird thing is that Jane had kept in touch with Paula and we went to her wedding with me knowing nothing of the history. When we got back together she asked if I still wanted to have sex with others after my experiences and if I wasn’t prepared to draw a line under it we should probably call it a day.  She does fantasise about having sex with others and we’ve not involved anyone else since with one exception… A lifelong friend of mine, Simon, would occasionally visit us for hill walking weekends and tell us his marital woes of no sex…he had discussed this in detail over many previous weekends together and Jane said she felt sorry for him, and had considered giving him a blow job but not if he was still married.  I did find this a surprise at the time as it was before we separated when she told me this.  A while later they were separated too and I reminded her that he was coming for the weekend.  After a days walking with friends and back home with kids still at my parents, we all had the house to ourselves and during a late night drunken conversation around his sex life….he slipped into the conversation that he still wasn’t getting any sex and wanted to make up for two decades of next to no sex. I spurted out  that Jane had considered giving him a blow job but not when he was still married. His reply was “I would love one and he'd always been turned on by his frank conversations with Jane." Jane said "I'll give you a blow job when you're in bed later"....which she did, but a bit sooner than bedtime. He was clearly distracted by the thought and had a bulge in his pants, as I did too. I looked at Jane and said "Am I involved in this?". Jane said I can handle both of you but I was offering Simon some 1 on 1 attention. I'll let you guys decide while I freshen up".. When Jane was out of the room, Simon said he was cool with all three of us being involved and had been having fun over the last years of his sexless marriage. Apparently he'd discussed this with Jane over the years we'd been walking but she'd kept it between them. She didn't condone it but understood his needs. Jane returned in her dressing gown to find us both sitting naked on the sofa. Simon was rock hard with a distinctly average, smooth uncircumcised cock.  "So I'm not giving Simon some attention on his own then?" I replied "No we're both going to fuck you"....which is pretty much what happened. We've not involved anyone since.