I really like his expression when he went "What the fuck are they doing"?
Hmm, but man, I kind of feel a little bad for the protagonist, his friend stopped coming to play the guitar after having sex once and just started fooling around, leaving him alone.
I must say though, seeing that ending makes me kinda of curious as to what it sounds like. It's so good that people start hallucinating sex with her? If they played in a concert hall or something, I'm sure she could easily fuck a whole lot more than just a thousand guys.