Years ago I was trying to hit on a waitress where I had lunch a couple of times a week. I never did close the deal. All good.
Later on I found out she had two roommates, both were guys, no biggie really. Couple of months later I see her at a bar with another girl, we get to talking, drinking, she asks if I want to go to her place. I asked about her roommates, she says they're both cool. Come to find out they live in a two bedroom place and she didn't have her own room, she slept with, and had sex with whoever's room she stayed in, sometimes it was a three way. I kinda freaked out and politely declined. I was early 20s and had no idea how hot an mfm could be.