You didn't ask about motivtion. You asked about whether they're bi or not.

No one cares if you're homophobic. It'd be a lot cooler if you were.

The motivation for mopes probably differs from mope to mope. Money, the chance to maybe touch a girl, participating in degrading a whore, attention, self medicatng their assorted psychological problems, the idea it will make them a "star" or help them break into the biz, and maybe just rubbing asses with other guys.

Motivation for making gb vids = money.