PM dares

above i will post in a person above thread of your choosing within reason

potato i will post in a cumulative hot potato of your choosing

wet underwear I have to pour a glass of water in my undies

toilet scheme decide when i can go / what i have to do to go to the toilet

wedgir XY i have to do a wedgie of typr X for qy minutes[*]

Toilet ban X i am banned from using the toilet for X hours

Head have to hold my head over the toilet for X minutes with toilet being filled with Y.

icy balls I'll hold an ice cube to my balls until it melts

Any more ideas