Which is an abnormal behavior related to mental illness?

I put starving yourself to stay skinny and being constantly suspicious although idk if it COULD be the dressing up in costumes and asking for food one too. I KNOW for a fact it's not wearing all balk and dyeing your hair extreme colors because that could just be an act or statement

when you rub, you also apply pressure, that pressure can urge the poop to come out. i think that when your rubbing, you also might be slightly breaking it up and that can further fill the stomach.