And people... lets stop with the "black man theory"....the stereotypes are not always true. And one more thing....height apparently has no bearing on size... I have met men who are almost 7 feet that are less than 5" in the pants.
The bottom line is this:
Every womans body is different and people fit together differently. To some woman ... 6" can hurt them and to others... 6" isnt enough.
If you want to know more about this, check out this website about the Kama Sutra theory regarding both male and female genital size:
http://www.spaceandmotion.com/kama-sutra-partners.htm