One of the weirdest doujinshi I own, incidentally, has to do with Akutsu x Tezuka....kinda. Oddly enough, it's based off the Rush and Dream video game continuity of all things, in which both Tezuka and Akutsu go off to America at some point.

No pushing-down-and-screwery, I'm sorry to tell you. It just struck me as such an odd and interesting pairing I thought I'd throw my two cents in. XD