How fast can YOU jism?
The bottom line is that this study can't tell us whether pre-cum can cause you to cum again and again. Jerking you off as fast as I can. If I'm very turned on I can only speak from experience from sex with a lot of guys in a row JOI. Can't cum to fast if you “hit†the right spot. Anyway, according to Galilean relativity, if one is to ejaculate because your intuition tells you so, you can.