Good point, the changes would be massive and affect government and budgets at many levels, it would sure reduce illegitimate babies though, something the female pill had the opposite effect on.
I bet the feminists would be raging if the males gained control over pregnancy and child support and could have all the fun they wanted without threat, it would be interesting to see how they attacked it.
It is called a condom and really reduces the chances of fathering a child.
As much as the pill does.
But guys do not want to use it.
If you really do not want to ever father a child you can get snipped.
If you want you can freeze your sperm so you can father a child in the future if you change your mind.
But once again guys do not want to do it.