亻
=
丿
+
丨
:
Mnemonic symbol: Rosa Luxemburg. She's quite radical, and her name starts with "r", just like "ren2". Also, 亻appears at the left-hand side of characters, and Rosa is a leftist as well.
Robinson Crusoe (r) and Rosa Luxemburg (亻) are having their favorite snacks in the encampment's kitchen: Rosa is eating a banana (丿) and Robinson is eating a dinosaur bone (丨).
娄
=
女
+
米
:
Bessie Coleman (女) invited Sir Lancelot (l) over for dinner in her lunar mansion (娄) in the outhouse's kitchen (ou2). Because Lancelot is extremely hungry, he brings a sack of rice (米) as a present for his host.