This goes back to the 1970s - 1978 in fact when I was 20 years old and still quite inexperienced. Yes I had had sex with quite a few girls but with one exception it was all very vanilla.

I used to go to a hospital social club quite a bit (I'm not even sure they have such things now) but it was very popular; frequented by doctors, nurses, physios, porters - you name it they went there. A lot of people I knew on a first-name basis but being a teaching hospital people would come and go quite regularly.

One late afternoon, I was chatting to a few mates when one guy edged his way to the bar, bought a couple of drinks and went back to his table. It was not memorable at all until he did the same thing again about 20 minutes later, this time saying "hi" as he meandered his way back.

At his table was a nice looking girl I guessed about 23 or 24 years old. Trying to work out his age was difficult but I thought a little older. I had no idea that things would turn interesting.

But interesting they did, as a little while later the guy on coming back to the bar again, struck up conversation letting me know that they had just transferred from Bristol and this was their first evening after settling in to their new flat. He invited me over to meet his girlfriend, which to be honest seemed like a bit of a pain at the time as my friends were talking about moving on to another pub.

Out of politeness I went. We talked at the table for about another hour and then he suggested we go back to the flat for some more beers and some snacks. My inhibitions (if I had any at all) had disappeared by then so I tagged along.

No beers or snacks were forthcoming and it was probably less than 10 minutes after getting into the flat that the couple started kissing and petting making me feel like the proverbial spare prick. Things very quickly took a surprising turn as he unzipped his jeans and pulled his cock out for her to wank and suck. She pulled down her top and undid her bra - her tits weren't huge but nice nevertheless. I watched on in earnest as slowly they both stripped each other completely.

He then got up and pulled his girlfriend up and said they were going to the bedroom - "do you want to join us?"

Stripped naked she was gorgeous; a lovely body and very fit. He was quite toned as well with a lovely cock that was impressively hard. With not an ounce of reluctance I followed them. She quickly came up to me and stripped me too. She then said she wanted me to fuck her while the boyfriend watched. I had to oblige! No licking no sucking just straight to the fucking, missionary style.

She was one of those girls that cums quite a lot - not really big orgasms but a lot of them. She liked to close her legs and for me to put mine on the outside of hers. She would grab my arse and pull me into her. He all the time was wanking and watching. That is until he decided to join in. He had some liquid on is fingers which he pushed into me. She kissed me almost as if to stop me saying anything. The next thing the guy started to push his cock into me. I had never done anything like this before. Like many young lads I, suspect, I had wanked off with other lads but had never tried anything like this.

It was not at all comfortable but he knew exactly what to do and rather than fuck me wildly he waited until I got used to the feel of his cock inside me. I wouldn't say I completely enjoyed the experience but I did get used to the size of his cock. Once he started pumping though I could feel myself starting to cum and she loved the sensation of me squirting my spunk into her. He came almost straight away as well.

The post-coital atmosphere had all the potential to be very awkward indeed, but it was anything but. We eventually had the beers and a few snacks and more sex. He was much more interested in fucking me than his girlfriend and she sat in a chair at the side of the bed playing with herself while we sucked and fucked - well he fucked me again.

Over the next few weeks the same pattern played out, we would meet go back to theirs and all get on the bed. Very soon though she would only ever watch. Things progressed a little too; he wanted me to wear her panties and he would wank me into her panties whilst he fucked me.

They or rather he, wanted this to go on and on but I got all mixed up about it and had to stop. Looking back on it I suppose he was more gay than straight but it taught me lot of things, not least how to suck and take a cock which I have done many times since!