We are strange creatures!!!
There are lots of things we do without noticing why we do them!!!!
"KISSING": the urge to kiss is not brought about by genes,
so why do we find it so pleasurable to share saliva???
Nose-picking: Many of us do it, but eating bogeys offers little nutritional reward - could there be health reason for the unappealing habit?
Laughter: The discovery that laughter is more ofter produced at banal comments than jokes prompts the question, why did it evolve??
Pubic hair: Scent radiator, warmth provider, or chafe protection? The answer to why humans have clumps of hair in private places is still open for debate.
Blushing: why we would evolve a response that lets others know that we have cheated or lied.