Take the thickest marker from your desk and put it in your pussy. It stays there the rest of the day. At the end of the day remove it. You may suck and lick it clean but that's it then it goes back on your desk.
Cut a hole in the bra pull you nipples through and put a clip on them do the same with your panties
Stick something in your urether
Upload 3 pic perminantly
Put something hot down your panties (chills,toothpaste,menthol)
Put tacks in your bra or through it
Masterbate with food or an item and put it in a communal area for someone else