羞於啟齒

羞 = 丑 + 羊 : Marie Curie (xi) arranged a blind date for two friends in front of the outhouse (ou1). The two friends are an ox (丑) and a sheep (羊). As they see each other for the first time, both are very shy (羞).

于 = 亅 + 二 : Mnemonic symbol: prepositions (in, at, on, to, ...) are what glue the sentence together. Honey is as sticky as glue, so I'll represent 于 by a honey jar.

Yu the Great (于) was assigned to repair the electronics of the space station's kitchen (Ø2), but instead he was snacking honey from a honey jar (于). Unfortunately his capacitor (二) got stuck in the honey and now he has to use a crowbar (亅) to lever it out.

启 = 口 + 户 : The Queen of Hearts (qi) is informing (启) every member on the space station that from now on she has to be greeted with 启奏万岁 whenever someone wants to see her in the space station (Ø3). Furthermore, anyone visiting her has to bring a mandarin (口) as a present. She writes this rules down in orange on a wooden swinging door (户) so that no-one forgets.

启 = 口 + 户 : The Queen of Hearts (qi) is informing (启) every member on the space station that from now on she has to be greeted with 启奏万岁 whenever someone wants to see her in the space station (Ø3). Furthermore, anyone visiting her has to bring a mandarin (口) as a present. She writes this rules down in orange on a wooden swinging door (户) so that no-one forgets.

齿 = 止 + 凵 + 人 : Charlie Chaplin (ch) has an aching tooth (齿), and Neanderthal Man (人) is about to help him take it out using an electrical barrier (止) in the space station (Ø3). They attached the barrier to the tooth and as Neanderthal Man will plug it into the receptacle (凵), the barrier will pull out the tooth.