Nonsense gives pleasure because it momentarily liberates us from the constraint of the necessary. We laugh when the expected discharges itself harmlessly.
John Lennon was so annoyed by people who "read in" to Beatles' songs, searching for hidden meanings, he purposely began writing nonsense lyrics to confuse them. Like "the Walrus was Paul."
Nonsense is not at all the absurd or the opposite of sense, but rather that which gives value to sense and produces it by circulating in the structure.
Nonsense is a slight generally applied to any sense that happens to differ from our own.
Nonsense is a more effective organizing tool than the truth. To believe in nonsense is a clear demonstration of loyalty. It serves as a political uniform. And if you have a uniform, you have an army.
Nonsense has a sort of abstract beauty such that it, as a kind of irresponsible inverted wit, has no moral to preach and no abuse to scourge.