Why be limited by what our puny brains think possible? Game or not, we must evolve beyond that kind of narrow-thinking and grasp for a higher truth. Lest we become stuck - and stagnation equals extinction!
Okay, ahem...back to ground level. I have had male Sims be pregnant several times. They are just empty polygon shells and have no genitals or hormones within. Babies are born by teleportation from out of nowhere, as there is not even an unborn child inside that pregnant-looking belly. So, I just handle it by doing nothing in particular.
