i'm 23 year old woman who has had threesome sex with my friend and her boyfriend. The thing is it wasn't just meaningless sex to me. It meant something to me that I slept with both of them. I am having feelings that i don't understand about having sex with them. I feel that i'm being used for sex though, because i chatted with them on facebook and they keep talking about the next time we have sex together. It would be so much better if everyone in the threesome was single because there would be no power imbalance.