Don't. I'm 6.5 around max and consider myself slightly above average. I've received compliments but no woman has ever run laps around the room waving her arms.
Dude i played high school baseball and most of my team was black, never embaressed when it came shower time
facts still stand,
1. women lie about the sizes of men they have been with..
2. The average caucasion US male is 4.5-4.9 inches in girth when fully erecet. make no mistake If you are a white dude packing 6.5 inches (a legit 6.5) your bigger than 95% of men most women will be with....u must fuck with mud sharks