Try to think of something extraordinary that fits your real abilities in the sheets.
Mine probably would be absolute orgasm (self-)control while doing anal. It’s sometimes not easy for me to hold back my orgasm doing PIV, especially while using a condom or after a long dry spell. But with anal sex I could go for hours with full enthusiasm without blowing my load unless I want to. And if I want to It’s always there in a range of a few seconds for me to go for.
Being bi is already a superpower. I can feel hotness in anyone, and have a spectrum of pleasures that the vast majority of humanity doesn’t know.
If I could have one more superpower, it would be to change appearance, body and sex at will to experience even more things.