Wow, these glitches seem so... grotesque?... compared to mine. On the other hand, mine happened years ago (maybe five or six), without the help of any mods or CC, and with only the base game and ambitions. I suppose you could say my sim had an ambition... Anyway:
I was playing a game where I wanted my starting couple to have a house full of kids. When the fourth or fifth child was born, the game congratulated me on having a baby girl, who, I'll call X in lieu of actually trying to remember the name of a sim in a long-gone save. X developed normally, hitting all milestones without a hitch. A few days into being a teenager, though, I noticed a certain change in X's portrait's appearance. Where there had previously been the portrait of a standard blonde cheerleader type, there was now a different face... with a goatee and what I mentally refer to as newscaster hair, in light brown. I did think the face looked less male and more female-in-reverse-drag, but it's harder to distinguish with teenagers. X's actual face and body looked the same as before, but when other sims in the family thought of or had a wish for an interaction with X (chat with, hang out with, etc), the mini portrait accompanying the wish would display the changed visage. Whenever I quit and reloaded the game, X's look would revert to the original teenage appearance, but after about 24 sim hours, the goatee would reappear. This change continued into adulthood and was still present when I eventually got frustrated and abandoned the save for other reasons.
I always wondered whether X was trying to tell me something. As far as I know, there's no "treatment" for this kind of thing in the game (short of a nraas-enabled trip into CAS), but I wish I could have had a real conversation with X about how to handle this. At least the family adapted well; I'm actually pretty proud of the sim parents for immediately accepting X's new identity, even in their internal wishes.
Sorry for no screenshots; even if I had them (and could find them), the pics themselves would be boring.
