So, this book exists. Here is an extract from the blurb (funniest bits highlighted by me):
Socially awkward for as long as he can remember, Harold feels his enormous package is just one more thing to be embarrassed about. Especially once hunky and popular Owen McKenzie notices it in the showers.
Owen knows he’s bi, but he keeps that secret close to his chest. He likes Harold, and wants to help him shed his dorky image and maybe even find a boyfriend. Still, Owen can’t stop obsessing about Harold’s equipment. And much as he doesn’t want to flip-flop on his sexuality, Owen does want to test-drive what Harold has between his legs.