This takes a bit of explanation, as I'm both asexual and generally sex-repulsed. In my early teenage years, I quickly realized that I was extremely sexually inactive compared to my peers. I'd masturbate around once per-month and it was more of a "cleanout" than an activity I enjoyed. As I became an adult, I found myself actually really disliking penile pleasure in basically every form. Even for me today, touching my penis feels uncomfortable and unpleasant. It doesn't hurt. It just feels gross. I've talked to multiple doctors about it but have never been able to come up with an answer as to why. Honestly, I kind of prefer myself this way anyway, so it's not like it's a huge burden. Just a weird personal quirk.
That said, when I got into college, I started wondering if my body would react in a similar way to anal pleasure. Fingering myself never gave any conclusive evidence, so at age 21, I bought a cheap dildo on Amazon just to try it out. Turns out, that was a really good call. Soon as I had a dildo touch my prostate, I was in heaven. Having a sexual act actually feel good was really bizarre to me, and I wasn't really sure what to make of it. I kept trying more stuff with the dildo once per-week just to experiment. Within a month, I was able to cum hands-free. Within two months I was able to do so reliably. I haven't cum "normally", from penile stimulation, since.
I'm still incredibly sexually inactive. My sessions are now usually once every two weeks or so, and I'm not really interested in pushing myself further than that. Even every week leaves me feeling pretty deflated. When I get a dildo in though and start riding though, it's impossible to hold back moans. Seriously, for any guy who is even semi-curious about exploring anal play, I can't recommend it enough. Get some water-based lube (Bad Dragon's CumLube is honestly about the best stuff you can get for the money), get a cheap dildo, and go to town. If you want to go a step further, buy a dildo mount, grab a dildo with a suction cup, and try different positions. Hands-free orgasms managed to turn me from the pinnacle of male chastity to a pretty major butt-slut in zero time flat. You don't need to be gay (or even be generally interested in sex at all) to get the most out of anal play. Don't get tied down by the stigma and just buy a dildo.