So, only 10% of the ejaculate is sperm will make it through the cervix into the uterus, rest will flow away as "cream pie". This begs the following questions:
When does the sperm that entered the uterus but never fertilized come out?
Why do women who wish not to become pregnant bother trying to wipe all the ejaculate out of their vagina when semen would have already advanced into their uterus?