unconventional sex

my bf loves to eat me out from my vagina to my butt. he's sucked my toes. nothing off limits. so i was talking to my bf & asked him

if he would be interested in me licking his butt. he said no but this lead to many other topics including me sticking a vibrator in his butt. he said he'd rather have that then me put my mouth near his butt. we are very open sexually & he says the only thing off limits to him is being with another man. i'm really turned on by the idea of using a vibrator on him, but i feel gross because society would imply that he is gay for enjoying it. what's your opinion on it?