Repression and conservatism force those of us more liberal in our leanings to find ways to embed and code the things we wish to express.
For example, all of the wonderful, pop-culture products of the 70s that were about getting high on marijuana: The song "Puff the Magic Dragon", Scooby Doo, and the bizarre and frightening show H.R. Puffinstuff.
Pop Music used to be much more rich in metaphor than it is today. The Coaster's song about a sexually-liberated but potentially disease-transmitting female: "Poison Ivy".
The freedoms and joys of liberalism yield diminishing returns. Put that in your pipe and smoke it.