I think the guy has a perfect game lined up, to be honest. He never makes the first move. He does, however, provide them some serious amazing feelings, and there's no way any girl isn't wet after getting worked over like that, even if the dude is gross.
I bet more than a few have offered to finish him off, at least with a handjob or the daddywaddy legendary 'mop n glo', jerking off on her. Like, a tip for his services. Some might just be so turned on. At least that's what I tell myself.