Same here. It was only later that I got hooked on the sensation of pushing my cock into her after she'd just come and was still all tight and sensitive.In my youth, I was self-conscious about possibly cumming before my partner did, so by making her orgasm first, it was kind of a relief like, OK, now that that's out of the way...
There's probably, a better way of phrasing it, but that was basically how I felt then.