If history says he is lying, and there is no plausible answer so far that doesn't involve lying with him, how do you trust him intimately?

You know the one thing that I don't see mentioned in this thread, is that maybe he created this account because he wanted to try to do a couples porn account. If you go in any gonewild type group in our age range, just about every single account is a couples account with men posting their wives, wife-sharing or hotwife type scenarios, and/or unicorn hunters. Maybe he has fantasies of pulling you into something like this or at least posting you, which could be why he wanted you to write him that story as a prelude to get you to post outright porn of yourself, with or for him. If he's supposedly honest about his porn history, and yet he's sneaking around, I really can't think of anything else plausible there, its all so weird and troubling behavior.