Well, I think it's because our overall cultural standard of beauty IS the female form; specifically, the idealistic "36-24-36".
It certainly wasn't always that way, to be sure. In the days of pederasty amongst the Ancient Greeks, the male figure, specifically the pre-adult male figure, was the standard of idealistic beauty.
So, I guess my answer is that you were born 2500 years too late!
As to your 3rd question...well, all I can say is that a woman complaining that a guy lasts too LONG...that has to be a first! 