And how does the cum displacing work after all? Well, according to Gallup our cocks were sculpted in such a way that our tools would effectively displace the jizz of competitors from their partner’s vagina, a well-synchronized effect facilitated by the “upsuck” of thrusting during fucking. Specifically, the coronal ridge offers a special removal service by expunging strange cum. Gallup’s experiments showed, that the effect of thrusting would be to draw other men’s juices away from the cervix and back around the glans, thus scooping out the spunk deposited by a sexual rival.