Rhythmic contractions of the male and female reproductive structures occur during the phase.

To complete the sentence: Rhythmic contractions of the male and female reproductive structures occur during the orgasmic phase. It is the rhythmic contraction of the bulbospongiosus and ischiocavernosis muscles. This is happening during an intercourse. I hope this answer helped.

Ithink it’s around 500 million or something. kinda scary honestly but that’s just my opinion.