Then they should only bed women who want to be mothers. Preferably after marrying them.
The way I see it is that sexual intercourse--excluding rape--takes the consent of two people. I think that any two people having sex without taking precautions or communicating what they want to do if the woman conceives are pretty stupid. I really hate the victim-complex that society gives to women. A guy impregnates someone's daughter, he gets blamed more than anything, even though she consented to it, a woman is left with a kid, the father is blamed for impregnating her (even though she consented), a woman leaves her husband and demands alimony because she can't find a job, that's her fault for putting her trust into the wrong man and not having a back-up plan on what to do if they ever separated or he died. On the other hand though, if a greedy or manipulative woman takes advantage of a man or uses him, no one cares at all and blames it on him for being stupid, yet, the moment we even suggest that maybe the woman is responsible for something, the feminists immediately accuse us of being misogynists.
Anyhow, if morally you believe that raising a child is the responsibility of both parents, then why shouldn't the father be allowed to raise up the child on his own if the mother does not want it? If the woman can force a deadbeat father to pay child support for the child, then why can't a man force a deadbeat mother to birth the baby for him to have?