It could also depend on how much warrior sperm your DH produces as compared to baby making sperm. The baby making sperm will go hunting for an egg, while the warrior sperm can last for up the five days DTD in the entrance of the vagina checking the passports of any other "boys" who might enter during that time. If the boys come from a different country (as in, a different man) then it's game on.
I would like to see that movie! Obviously, Professor has all fighters and no lovers