It goes without saying he needs to go to a urologist.
I saw somewhere that men who are not over weight might have extra fat down there that can cause it to hide, also that with age the muscles fall. But I was reading that there is something called "atrophy" that can cause hidden penis due to lack of testosterone.?.
definately not obese, it just is FLAT, inside itself, seriously, he is embarrassed by it, so he won't try pills, or letting me try to excite him,, bad situation
did he really tell you his penis is in his stomach? i know to go into the stomach is impossible but is it possible to retract into the body> sorry i have never heard of this before.