"As long as men are forced to pay child support, they should have a say in abortion."
Wrong.
The right to privacy belongs solely to the woman, where her liberty to decide matters both personal and private are immune from attack by either the state or the father:
“If this case concerned a State's ability to require the mother to notify the father before taking some action with respect to a living child raised by both, therefore, it would be reasonable to conclude as a general matter that the father's interest in the welfare of the child and the mother's interest are equal.
Before birth, however, the issue takes on a very different cast. It is an inescapable biological fact that state regulation with respect to the child a woman is carrying will have a far greater impact on the mother's liberty than on the father's. The effect of state regulation on a woman's protected liberty is doubly deserving of scrutiny in such a case, as the State has touched not only upon the private sphere of the family but upon the very bodily integrity of the pregnant woman.”
Planned Parenthood of Southeastern Pa. v. Casey 505 U.S. 833 1992