As a teenage girl, I could never figure out what was more obnoxious: Guitardudes blantantly trying to get into the pants of any of the girls too polite to walk away from his beautiful jamfest, or that girls actually fell for this shit.
Another guitardude winner: The guy you just started dating or who is trying to date you, and he writes you a song and plays it for you. I immediately assumed they "wrote" that song for every girl they'd spoken to. But you're forced to smile and nod and wonder how much longer the song could possibly go on. And when is the appropriate time to cut them loose, and deal with the inevitable "But I'm a Nice Guy" talk.
I married a guitar player, and my god he never did this shit.