I recently lost a very close female friend of many years because she came onto my fiancee and wouldn't stop after I confronted her. It started after she accidentally walked in on us once during sex; apparently she wanted to see for herself what it would be like to be with a big dick (her boyfriend is avg size). My fiancee told me about her advances and I trust him completely when he says nothing happened. I never thought she would be one to do something like that, to break the cardinal rule of friendships: boy/girlfriends are off limits! Among close friends we talk about everything, but I never go into detail about my sex life and certainly never bragged about how great it is. Maybe the after-sex glow / flushed face is hard to hide, and occasionally the walking impediment after a LONG (pun intended) night Anyway, just needed to get that off my chest. I can't stop thinking about it and wondering if I did something wrong to lose a friendship.