penis sperm ejaculation into vagina

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In other words, the repeated thrusting men do during sex could function to displace other men’s semen, before they ejaculate. Zietsch suspects penis shape could affect sex duration in bed. In a 2003 study, using artificial vaginas, artificial penises, and artificial sperm (corn syrup), researchers found the ridge around the head of the penis is able to scoop out pre-existing syrup from the vagina.

Date: October 25, 2023

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