賅

亥 = 亠 + 厶 + 人 : Mnemonic symbol: a boar.

亥 = 亠 + 厶 + 人 : Hamlet is terribly afraid by a beret-wearing boar in the airplane's bathroom, but fortunately Neanderthal man is there to protect him and to fight of the boar with a huge fake nose.

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.