Sex or masturbation??

Tye

So I've been with this guy and we've been having sex for the last month, we do it every 2-3days and it's nice. I keep track of my sexual life with this app and I just so happen to notice I haven't masturbated in a month and like 3 days, I just haven't had the need to masturbate because I've been having sex. So I masturbated for the first time in a month and it felt great, but is it weird that before I even actually did it that I kind of wanted to masturbate to get off instead of have sex? The guy I have sex with isn't bad at it, it feels really good but sometimes I feel like I don't even cum when we do it, so could that be why? Has anyone else ever wanted to masturbate instead of sex?