Because clearly they've never heard of birth control. Or - you know - the fact that there are all sorts of pairings that can't possibly result in pregnancy.
[Well, you know, except when they do. Like that one time... Okay, shutting up now. And looking very grim.]
Sounds like a chip, then, yeah. Fantastic.
[And now he wants to stomp and shout all over again at the petty, narrow-mindedness of some people - or AIs.]