After sex with a condom the mustard patch or tardy patch becomes an issue so you leave the room to find something to clean up the mustardy goo. You invariably end up in the kitchen where you pick out the grimy dirty yellow dish cloth that will serve as clean-up. You then hang it back up since it's done it's job.
I wonder if I should tell my roommates about the german hanky I used to clean up my tard patch. Hmm, on second thought maybe not.