授
=
受
+
扌
:
Sherlock Holmes (sh) got a honorary professorship (授) position in the outhouse, but because his office has not been established yet, he has to teach (授) in the bathroom (ou4). He uses a stretcher (受) as blackboard and a toy claw (扌) to point at his notes on the stretcher.
课
=
果
+
讠
:
Karl Marx (k) notices an advertising column (讠) in the elevator's bathroom (e4). He decides to teach these capitalists a lesson (课) and throws grapes (果) at the ads, messing them all up. That'll teach them!