偽幣

伪 = 为 + 亻 : Rosa Luxemburg (亻) went to visit Willy Walrus (w) in the Eiffel Tower (ei3) to buy a bird with crazy hair (为), but she finds out very soon that Willy Walrus just wanted to sell her a fake (伪) one: a regular penguin with a wig.

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.