I watched an interesting program on NatGeo which ranked the top 10 amorous in the animal kingdom. Green flogs mount on anything moveable in the river including floating logs, a female playing mantis eats the male after the act, a certain mouse with excessive adrenaline it mounts until it dies and top of the table were baboons that mount on each each other from children , male and females-its a party. Its seems humans are evolving towards their ancestors!