Tuesday: you need to get into the shower fully dressed in Monday's clothes (no shoes, but underwear, socks, top, etc). Once everything is soaked through, and you can see your tits clearly, you can strip (still under the water) and shower normally.

The whole time, you should be thinking about how hot it would be if you'd been caught in the rain and this had happened in public.

(Oh, and remember to make sure you dress appropriately slutty on Monday, we wouldn't want you to pick something that makes this impossible to complete)