二側

二 = 一 : Mnemonic symbol: a capacitor, because the two strokes remind me of the symbol in electrical drawings. Albert Einstein (Ø) is experimenting with a capacitor (二) in the space station's bathroom (Ø4). He finds that it's uncomfortable to discharge a capacitor using two flutes (一).

侧 = 亻 + 则 : Wu Zetian (则) and the King of Chu (c) got married in the elevator's bathroom (e4) and after the ceremony they are so drunk that they have to lean against (侧) Rosa Luxemburg (亻) to not fall down.