Adam Carolla had a funny observation on his podcast today about balls. Basically, he said that breasts are functional but also desired. Ditto on vaginas and cocks. But balls. Women don't talk about them. No one says someone has great looking balls. Only men seem concerned with owning a pair. Women just put up with them since the cock is there, but never talk about 'em.
I thought it was hilarious and so true. Scrotums have never been an area of eroticism for women despite them holding the functional keys to all other areas of manliness. LOL
Check out his podcasts. They are pretty funny. He had a pretty good one interviewing Jack from Jack in the Box.