We know what the animals do, what are the needs of the beaver, the bear, the salmon, and other creatures, because long ago men married them and acquired this knowledge from their animal wives. Today the priests say we lie, but we know better. – American Indian Proverb

Drinking, when we are not thirsty and making love all year round, madam; that is all there is to distinguish us from other animals. – Pierre De Beaumarchais

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. – Mark Twain, Letters from the Earth, 1907