I believe a lot of men have a fantasy about watching their wife/partner being fucked by another guy while they watched. But it’s not the sort of admission that can easily be revealed to wife or partner, or to get it to actually happen. Here’s my suggestion that worked for me. After sex ask if she ever has a sexual fantasy. She may admit it or deny it, it doesn’t matter. You can, though, be reasonably sure that she’ll ask you the same question. Admit that you do, but show great reluctance to say what your fantasy is. Extract a promise that she won’t get angry if you tell her. Her curiosity will be so strong that she’ll give the promise. Then tell her. You are likely t get a response something like “I can’t believe that you’d want me to do that”. Just answer “Well sorry, I just do. I just can’t help it. And it would be just the once”. Then leave it there. She’s quite likely to mull it over and raise the issue again. Just tell her that you’d like it to happen, just the once. If she doesn’t bring it up herself, casually ask if she’d thought over what you’d been talking about. No how it’s raised, just ask her if she’d do it, just the once, and do it for you. If you’re wondering how to find a suitable guy, ask in the comments and I’ll offer suggestions. When you've arranged it to actually happen you must make sure that it’s a great experience. Here’s my suggestion. Go down on your wife/partner with some oral sex, keeping going until she’s just short of reaching an organism. Then let the guy fuck her. Chances are she’ll have the orgasm that you’ve prepared either immediately, or a short while later. If you would like a repeat performance, maybe with another guy, here’s my suggestion. When she’s had her orgasm as described above, get the guy to stop before he ejaculates and you take over. Depending on the state of her arousal, you might think about giving her some more oral sex or g-spot manipulation until she’s about to come again, then you or the other guy can continue taking her through a second orgasm. If she’s had two or more orgasms, then she’ll likely want to do it again – if that’s what you want. Another thought, based on my own experience. She may volunteer the information, or you can ask her if there’s anyone that she fancied. Chances are that there’s someone you both know that she’ll name him (it might even be the husband of her best friend!). Ask the guy if he’d go for a drink with you and your wife/partner, without his wife/partner, saying that there’s something important that you want to ask him. Likely he’ll be intrigued and agree. Then after a drink ask him if he found your wife/partner attractive. Even if it’s just being polite, he’ll likely say yes. By now he’ll be getting an idea where this is going, so just ask him straight if he’d like to fuck your wife/partner because she really fancies him, and that you’d like to watch. If he’s reluctant, get your wife/partner to tell him that no one will ever know (this because he might be worried that she’ll tell his wife/parner).