Indecency, vulgarity, obscenity- these are strictly confined to man; he invented them. Among the higher animals there is no trace of them.

Nature knows no indecencies; man invents them

I could have become a soldier if I had waited; I knew more about retreating than the man who invented retreating

There are no people who are quite so vulgar as the over-refined

The dog is a gentleman; I hope to go to his heaven not man's.

I have been studying the traits and dispositions of the "lower animals" (so called) and contrasting them with the traits and dispositions of man. I find the result humiliating to me.