You know how men usually tend to be unhappy with their God-given "rights"? Well, it turns out that women have the same problem. Worse, men and women both are generally out of touch with reality:
A 2005 study found only 55% of men were satisfied with their penis size, whereas 85% of women said they were "very satisfied" with the size of their partner's penis, and only 6% of women rated their partner as smaller than average. In the same data set, 70% of women expressed dissatisfaction with their breasts, whereas the majority of men (56%) were satisfied with their partner's breasts and only 20% of men wished their partner had larger breasts.
So, in summary, most people are unhappy with "what they've got" -- and most people aren't even aware that their significant other doesn't even care a rat's ass about it!
Another rather interesting tidbit I retrieved from the article:
A study published in BMC Women's Health, surveyed women's preferences concerning penis size and concluded that width rather than length is a more important factor of sexual stimulation.
So there might be some truth to the pencil-dick epithet, after all.