The special nerve endings of the clitoris and penis were already

https://www.facebook.com/permalink.php?story_fbid=pfbid0j9j1eh8F9fyQHSbr3D5L7NUi2dfdKF8oRXWhaXqF8YTCYv9UZ5rdun8taXbUirFkl&id=61562002464448