I think because he asks all his dates that he admires eagles and birds in general. The grace they fly with and how they take care of their young by feeding them worms. He then asks his dates to open up for the worm as he unzips his pants. Problem is, Tom does not have a worm for a cock. He has a snake. But I digress. I think his dates just think the whole experience is weird and that he’s a nice enough guy but the worm thing is just too much. At least on a first date. At least that’s what I heard anyways.