I would probably feel a bit upset. I know that I can't have children, but my woman should understand that for she loves me for who I am. If she really wants a man who can get her pregnant, I'd tell her to go find someone else. If she wanted to get pregnant and stay with me, then I'd work with her so that she can get a sperm donor. However, I don't think getting pregnant by another guy would exactly be a good idea. That would bring up a lot of unexpected legal battles when it wasn't originally planned. Suppose she says she rather raise the kid with me? What if later, she suddenly feels an urge to sue the other guy for child support or rape? What if later, that guy suddenly sues for child custody? Anything could happen. The more anonymous the sperm is, the less legal hassle you will have to go through. Donor is as the most anonymous as it can get... so there should be no problems. If she already got pregnant by someone else just to make me happy, that would be like having an affair with another guy without my knowledge. What if she does it again? What if she enjoys it? What if she ends up liking that other guy? A lot of things could happen.