For centuries we chose to hide sex. Someone spread the word that it was dirty and you should be ashame of it. Someone secretely implanted the notion that sex is wrong and that you should fight your instincts and get rid of it.
Then came sexual frustration.
Then came prostitution.
Then came the hypocrits.
Then came pornography.
Muuuuuuuuuuuito bom, senhor Pedro Veliça!