I love this! BeauZC asked for "a good memory aid" - which is exactly the kind of question you'd expect from someone who actually wants to learn the language - and MarkVoertexx gave one.
Kun Plezuro doesn't have to be a true word history to be a good memory aid. In fact, it's related to the English word complaisance - an act intended to please someone - but the meaning in English has more to do with bending to someone else's will rather than wanting to help them out. I like kun plezuro better.