Citation: http://www.straitstimes.com/BreakingNews/Asia/Story/STIStory_815212.html
Though I hadn't yet heard that someone ate surgically removed genitals of a man before reading the article, it seems common for women to suck their boyfriends' penises or testicles.
One day, my junior researcher asked me "Which did she eat his penis by upper mouth*1 or down mouth*2?", when I revealed his friend went out to play with the friend's girlfriend.
But, no one doesn't have enough kind to tell me how to get my genitals eaten by a girl's 'down mouth'.