I have no sexual experience. :P But this happened recently.
Few weeks ago, my sister was studying psychology and had to do a night shift in an asylum, I went there to pick her up with friend.
We waited around the asylum lobby, saw few patients and inmates around when suddenly there is a really hot girl came by and sit beside us.
She said she knew my sister, she talk, dress, and behave normally so I thought she is one of my sister's friend and we chat up a bit, eventually my friend manage to turn up the conversation.
Just when things about to get hot, she panicked, broke up the conversation and left. That's when my sister came then we left soon after, though my friend was still disappointed.
We chat about random stuff in car and my friend mention that hot chick, my sister reaction?
"Her? Oh yeah, everyone says HE is pretty, and a very friendly dude at that."