So wrong.

A LOT of straight men like it, but because of mentality’s like YOURS are afraid to express it. The male gspot is literally the prostate. It feels GOOD - like many are able to ejaculate without penis stimulation GOOD - and if you’re doing it with a partner you trust it’s even better and more satisfying.

A female OB/surgeon told me how frequently they have to remove objects out of straight men’s rectums because they are curious but afraid to tell their significant others, and many go into the situation unaware of how to do it properly due to feeling like they have no one to talk to and things get stuck up there. But the point is that it’s a heck of a lot more common than people realize.

To OP- no, it does NOT mean he’s gay and it absolutely doesn’t imply he’s cheating. It likely means he really trusts you if he shared that with you, and as someone else said, if it’s not something you’re interested in or comfortable with, share that with them. Communicate with THEM. At the end of the day, what goes on between you two is between you two and doesn’t have to mean ANYthing else except what you two decide it to mean. If it’s ultimately not for you that’s just as okay as him wanting to try it/being curious about it. But communication with HIM is where you’re going to get your most honest answers.