Okay, that makes sense to me. I know exactly what you’re describing. It’s never happened to me during intercourse (I can feel those very mild pre-orgasmic ejaculatory contractions), but it has happened by accident during masturbation when I was doing some “extreme edging.” Combine that with the problems I’ve had with condoms, and I’m never very comfortable, pregnancy-wise, without hormonal contraception. I’m hoping they can figure out that “male pill” sometime soon.
(My condom problems, [ironically?,] seem to stem from my excessive volume of precum. Condoms invariably slip off after I’ve been at it for a while.)