I mean, he's in a band, he's broke and it's good money you know? And Frank can totally stand still. And he looks good naked so.
The first time Gerard sees Frank he hardly looks down at the paper and at the end of the session what he's drawn is not really even human shaped. Gerard's professor sees it and starts ranting and raving about his new found way and the abstract masterpiece he's just created. Gerard doesn't hear him 'cause he's still thinking about the life models ass.
And Gerard gets slightly obssesed, because life models aren't supposed to be hot. They're all old men and slightly less old grumpy ladies (from my experience) and they're not supposed to look like Frank. With ink everywhere and piercings and smiley eyes. Not that Gerard minds.
And he gets obsessed with one of Franks tattoos and starts doodling it everywhere and one day sees him at a gig and is stuck for a conversation starter. Because 'hi, I've seen you naked' is probably not the best way to go.
And and. That's all I got, mind is still somewhat stuck on life-model Frank :P.