Re: What is on this sim's face?

@XCoco_LolipopX  That stuff on the sim's face is supposed to be pie, as in, the sim competed in a pie-eating contest.  If you use mods, specifically NRaas MasterController along with its Cheats add-on, you can remove the associated moodlet (click on the sim and select NRaas > MC > Intermediate > Moodlets > Remove Moodlet).

If you don't have that mod, the pie face should disappear when you take the sim into CAS, even if you don't change anything.  Do do that without mods, bring up the cheats console (crtl-shift-C) and enter "testingcheatsenabled true" without quotes, then shift-click on the sim and select "Edit in Create a Sim."