awkward post 😶

my boyfriend has been talking about being into butt play for a while. and to be clear, not my butt, his. while i want him to understand i don't think he's 'weird' and that it's totally normal, i can't quite wrap my mind around the idea for me personally. so i guess i just want to ask has anybody ever used a strap on on their boyfriend? and if so what was it like?