1. No proof that homosexual parents do no more harm than two heterosexual parents.
2. No, because heterosexual couples normally have children and hence benefit society more than the extra taxes screw single people.
3. So ban divorce. The romantic ideal of marriage is the most poisonous idea to ever come from England. Love is a fucking terrible reason to get married.
4. White woman/black man are over 98% of all black/white children, and result in a single mother raising her children over 90% of the time, compared with 70% of black/black and 27% of white/white. Seems like the prohibition was a good idea.
And the way all animals normally reproduce is through rape.