外币

外 = 夕 + 卜 : There's a hole in the wall of the airplane's bathroom (ai4), and from outside (外), a bat (夕) wants to enter. Willy Walrus (w) is very afraid of bats, so he does his best to hinder the bat from entering with a voodoo staff (卜).

币 = 丿 + 巾 : Brunhilde (bi) wants to take a shower in the space station's bathroom (Ø4). Wearing only a towel (巾) she is fiddling with the coin (币) operated switch. She is to greedy to use a real coin, so she inserts a fake one. The machine detects the fake coin though and instead of water there are bananas (丿) coming out of the shower head.