Stag/Vixen Story:
My wife's no doctor but she knows a man's balls are what makes sperm. The tighter an man's nuts get, the closer he is to orgasm. She worked me a little, knowing she can come back to me and finish me off. She wanted to concentrate on the other male. She took his right nut into her mouth and sucked it like a Jolly Rancher. She did lick her way up his shaft and eventually blew him off.