Pegging

My boyfriend and i have been together for a while and when we have sex, it’s great but i want to branch out and have more experiences with him as a couple. I’ve always been a little interested in pegging, but i have no idea how to bring it up to him.

He’s never told me his sexuality and I haven’t asked (not that it necessarily correlates to being bc interested in that) but i think he would maybe be interested? I found a butt plug one day at his house and can tell he uses it and i don’t think I’m supposed to know about it so I can’t mention it when I bring the other thing up.

Please help