I was in a concert. Two young women, one large and the other petite, were jumping around the dance floor looking for a hookup. The large one danced with me and pressed her warm body against me. Her friend was with a guy next to us, and she pulled her pants down, revealing her rear. The guy couldn't get it up and left. The friend invited me to penetrate her. I had brief concerns about STDs but then I thought "no, not like this. Not this. I don't want this", and I walked away.