If you don’t want a child and she wants it, you’ll have a child. You will pay alimony.
And if you don’t want a child, and she doesn’t want a child, then the uterus will be ripped by abortion. Or fuck her birth, too, even if you want a child, and she wants a child. If you were performed a similar abortion or medical manipulation after every female flight... you would quickly understand why women want less sex.