> You wanted a baby, you are there when your partner gives birth, you are both happy. What difference does it make where the DNA came from?

Thinking about raising a baby from some other father activates my disgust reaction. But maybe it’s more related to the idea of the woman’s (hidden?) infidelity than the baby itself.

> There are plenty of folks who have to rely on sperm donors or surrogate mothers to make a baby happen.

I don’t see other people’s difficulties as relevant to my preferences.

For example, homeless people eating from trash cans doesn’t affect my dietary choices.