Girls and ladies, some help please?

sorry this is random. i'm 14 and my 13 y.o. brother "pantsed" me today in front of my mom. he's so annoying and it's not the first time he's done it. in the past my mom's grounded him, but this she said she'd take away his phone for one day OR she'd make him do one of my chores naked - to give him a taste of his own medicine. i'm going with the naked chores, and trying to decide what to have him do. i was thinking clean behind all the couches, b/c to do that he'll have to straddle the top part, and u know what that means (lol, nut crunch). i could even come up behind him and lean on his shoulder while he's straddling it to add more weight. >:-D but wut do u think? help me out, girls!!!