I just have sex for my partner

I think I may be asexual. I've never really had an interest in sex, as long as I can remember. I'm ok with doing it, I can sit through a little while of it, but I don't desire sex and never have.

I've also never desire to masturbate. I did some reading and it peaked my interest and I tried and didn't care for it, though I never could orgasm.

I feel so weird for not wanting sex. On here and on other platforms like Reddit, people complain about having sex only a few times a week and I just think, "once a month is too much for me."