Sex is as old as human beings. We all know how adventuresome Adam and Eve were, till they discovered it. Since then, sex has been revolving from generation to generation. So it's something we can freely talk about and nobody is agnostic with it because we all are a result of sex.
Of all the activities one can enjoy in the world, sex is easily in the top ten. It's better than playing or watching soccer and more satisfying than eating pizza or gobbling the expensive liquor in town.