Do you think this is really strange?

I love my boyfriend and I'm happy with him but a few things concern me. I just found out he likes to stick things up his butt. Not just his fingers but vegetables like cucumbers. He bought a case at Costco not just because he likes them but because he also likes to put it up his butt. He said he's too afraid to get a toy at a store out of embarrassment.

He also likes being dominated and doesn't really like dominating.

I like a man who is masculine and I love being dominated. I told him this and he understands and doesn't hold it against me. And I'm happy with him. I don't mind compromising and being the one in charge every now and then. But it's not like it was my first choice.

And knowing this it just weirds me out a little. It makes sense because I know he has a prostate so that must feel good. But going so far as to buy cucumbers for it instead of just simple fingering is a little strange. I'm not concerned he's gay but I'm just concerned with how I feel. Is there anyway to come to terms with this? Maybe I'm over reacting? Serious answers please.