I don't think any man forgets the first time he slides his cock into the cunt of a woman he loves when it is already full of another man's cum. It is a feeling unlike any other. She feels different for a start - not just very, very wet and slightly stretched - but her whole body is on heat and trembling. Depending on the woman, she may be slightly submissive or directing exactly how you fuck but one thing is certain - it won't be long before you adding to the cum inside her. The first time I did this, I was living with a girl. We were both 25. She had two friends who were fucking someone else with their partner's full knowledge, and she was keen to try it out. So was I. But how? We invited a friend of mine around, got very drunk, and put a porn DVD on the TV, and the three of us watched it. You could cut the tension with a knife. After a while, I made an excuse to go upstairs, feigning drunkenness, but just sat on the top stair. After 10 minutes or so, I could hear the sounds of kissing and then clothing being removed. My cock was like a ramrod. It was not too long before I could hear the unmistaken rhythm of fucking. My girlfriend was a few feet away in the next room and my friend's cock was inside her. My heart was racing and I was more aroused than I had ever been in my life. It was difficult to tell but I thought they had stopped, so I crept into my bedroom. A few minutes later, my girlfriend came and lay beside me. "I think you are going to be very pleased," she said. I pushed her legs apart and pushed in, feeling my friend's still-hot spunk ooze out. It was indescribable. Within half a dozen thrusts I came. This happened on a half a dozen other occasions and each one is etched individually onto my memory. And the best thing? She was always incredibly horny for weeks afterwards. Very happy memories.