Boyfriend eject button.
I once dated a guy for about seven months while I was on the rebound from a severely trampled heart. He was a little wacky, but I found it refreshing at the time, I suppose.
We were at my friend's birthday party, having a grand time, when someone, in typical party fashion, picked up one of the guitars that was laying around and started playing "You're Just What I Needed" by the Cars. Everyone smiled and started singing along. My ex was not singing along. He rolled his eyes, then proceeded to pull the guitar out of this dudes hand, turn up the amp, and tell him "I play art rock, dude---watch out!"
ARGH UGG! EJECT!