Weird but maybe not? ANAL HELP

Hey guys.... so this is kind of weird but maybe not? TMI WARNING

I’ve never been able to cum through vaginal penetrative sex but I’ve been able to cum (and very fast) through anal sex???

Like even now when I masturbate I just need to put one finger in my bum while stimulating my clit and I can literally cum in 1 min? Whereas I can’t cum through my vagina. I find it a little frustrating because I would also like to cum through my vagina but it’s a lot harder.

Am I the only one or is it just me??