Zane always goes to the pool/swimming like this (don't let s1-2 fool you).

In the love triangle during s3, Wu got so tired of these two fighting that he gave them this punishment.

Nya has done this at least twice. One time when Lloyd was younger he ruined like all her clothes in the washing machine so she just grabbed the guys' clothes and put them on (yes Jay almost fainted from blushing).

That soon became a habit and everyone's just used to it at this point.

Bonus: Wu's 'hot mess' mug was a gift from Lloyd.