My ex lady friend, before we became amicable and friendly exes, had this experience with me one time.
Anyways she was supine on the bed and I was on top on her all lubricated up and all, a nice slow erotic thrusting, nothing animalistic, when ten minutes into it, her eyes go wide, she's gasping and screaming and panting, then all of a sudden, she pushed me out with her vaginal muscles and was bucking for a minute. I almost thought she was having convulsions the way she bucked for a second, then settled. We're both looking at each other, somewhat bemused .
She's getting all apologetic, but I kissed her & told her it was fine. Guess IF i was an egotist, I'd be flattered, instead, I just realized something about the both of us.
But she doesn't wanna give up, and grabs the back of my head with one hand, and lubes me up again generously and guides me back in with the other and assures me she'll disclose when she's getting ready again. Well, I'm already primed, and am using all the power in my being(Plus a little prilocaine from a delay spray.) to hold off ,well, this time goes 20 minutes, then she gets a little less vocal and I say I'm reaching the point of no return as well anytime soon. Well, she grabs my ass to prevent a repeat expulsion(Damn strong arms, ex gymnast) and holds me in place.
So-nothing really to plague your mind. Nor mine either. Rather elucidating if the truth be told.