How Come?

Every painting (they didn't have cameras then) shows Adam and Eve with a belly button each?

"Oh, no ... another chicken/egg dilemma" wrote Sheila, in Netanya, Israel. 

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When we sneeze we automatically say, "Excuse me!" and the audience (worldwide) then responds "Bless you!" or "Salute!" or "Gesundheit!"?

Sneezing is an involuntary response - so are belching and farting, but they are rarely remarked upon.