I've had one, with a good friend of mine, one night we were in bed together at my holiday house and late night porn came on. He reached over and started feeling my cock, so i really nervously returned the favour. Both of us are straight and had girlfriends at the time. We ended up sucking each others dick until we both came.... funny enough, a year later we tried anal out. That was the first and last time, after we agreed that we had "done it all" and still prefered the female race haha