
The floating head means his body is pregnant and doesn't render, because I don't have male pregnancy clothes installed at the moment. Never been so thrilled to see a floating head!
It's a very important discovery, as it means one doesn't have to install NRaas Story Progression and mess around with a billion settings (which they instructed me to way back) to allow male Sims to go through a regular female pregnancy with a positive moodlet, as opposed to when they get abducted by aliens which results in them becoming super obese, getting a negative moodlet and an occasional green glow coming out of their belly.
Plus, my Alvi lads can get their wish for a new baby fulfilled super easily!