Jay-Z is well known to be very hung. She could have her pick of successful guys and picked him (he doesn't have looks or the body). I bet his huge dick played a role since she does care about size.
In these days of celebrity worship, publicity agents and photoshop, I am always suspect when a celebrity is well known to be hung. If a big reason why Beyonce hooked up with Jay-Z is because of his cock, she has got real problems.
For me the perfect woman would be red haired, tight body, not too many freckles and a huge rack. But she also has to be compassionate, smart, caring, classy and flat out have her act together.
I am friends with a woman, who frames my artwork, who, physcially, is my perfect fantasy. Last year I was picking up some paintings she framed for me as gifts. I gave her a hug and wished her Merry Christmas. She gave me a real tight hug back. She was braless and I could feel the heat and fullness of those magnificent breasts for the first time. My cock started to stir and when she felt my bulge starting to rapidly grow she pushed her leg against my cock and whispered "wow" into my ear. I was so turned on and ready to go for it, but before I made my next move, I thought about the constant smell of cigarettes on her clothes, the fact that it was 10AM and she was already having her first of many glasses of wine for the day. I thought about the hours I have already invested listening to her talk about her depression, her asshole boyfirends and how her business sucks. Fortunately, my other brain kicked into gear and I was able to pull back and awkwardly talk my way out of taking the situation to its illogical conclusion.