扇貝

扇 = 户 + 羽 : Sherlock Holmes (sh) tries to escape the summer heat in the anthill's bathroom (an4). He makes a fan (扇) by attaching a lot of feathers (羽) to a swinging door (户) and fans some fresh air towards himself.

贝 = ⺆ + 人 : Mnemonic symbol: a crab. In the Eiffel Tower's bathroom (ei4), the Neanderthal man (人) and Beelzebub (b) are fighting a crab with staplers (⺆), but because the Neanderthal man (人) can't handle the stapler he accidentally staples himself in the forehead.