I think some people could use some education from one of the most well-known sex books on the planet, the Kama Sutra.
One of the things stated in this book is that there are three sizes of lingams (peni) and three sizes of punanis (vaginas).
Get the match right, and you have nirvana on earth.
Get the match wrong and it is either like driving a mini cooper through a tunnel or trying to get a camel through the eye of a needle.
The Kama Sutra also gives some good advice about matching up the libidos of partners as well.
I really don't think that sweeping generalisations about genitals or sex drives really works, there is such a HUGE amount of variability, such generalisations are really illogical.