I suppose I would agree that the degree of selfishness is higher in the man who's only contribution to his children's lives is his seed in their mothers' womb. Though since women are the only determining factor in whether a child comes into this world or not, it means that if a dyke couple or a single woman wants to have children, there will be children born, short of medical problems, injury, or death. So if a child is going to be born regardless, and end up in the exact same position regardless, what difference does it make if that child were sired by one man or the other? If someone was a nihilist and didn't give a shit about anything, I doubt they'd be having kids. Nihilism is cringe.