This story contains sharing partner and group sex. The names have been changed to protect the horny.
This is a true story. I had my first threesome experience with a couple from my time in college. My girlfriend, Karen and her roommate, Joan, lived in a small house near campus while her boyfriend was my roommate. I can't remember how that happened but I my girlfriend had been in school there for her freshman year while I attended another school upstate. We had met the summer before working in summer stock. We fell into lust and by the following fall I was attended her school and I assume we all met and began being roommates with separate houses. We were all in the drama program.
Because we were all sharing houses, we became very close. We stayed at their place most nights but had to keep separate places due to the fear of their parents finding out. This was in the mid-70's. Karen came from a very strict Republican, country club type family while Joan's boyfriend, Richard came from a very strict Catholic background. Both of them were very much determined to not let their parents find out about our staying over at the girls place. Joan came from a much more liberal background. I was four years older than the other three and more experienced, so I just didn't care.
As time went on, we all became more loose with our personal habits and it was not unusual for us to see each other in various states of undress. We didn't go around nude, but it was common to see each other in our underwear.
It was also a time of rampant drug use. We regularly drank and smoked weed and many times took everything from mushrooms, to LSD, to cocaine, to crank. Because of this we hung around other couples that imbibed as well.
One couple, Will and Donna, were regulars at our parties. Somehow, and I truly can't remember how it started, we all ended up naked and just partying at their house. I don't remember if Karen, Richard and Joan were involved, which in hindsight seems ridiculous, but I ended up fucking Donna on their bed with Will watching. It was really weird because Donna was not my type. She was pretty but had very small breasts and was rather thin, as was Joan. Karen was the opposite. Short and voluptuous. Around five feet and with very large, firm breasts. She could not have been more different from the other two girls. Anyway, it was rather fun and I enjoyed fucking her in front of her boyfriend and they both were cool with it.