The reason you hear girls talking about the taking 7+ inch diks is because guys lie.
A lot of guys are deluded thanks to porn, it's no wonder why so many white men feel insecure when it comes to black men and white women.
The average penis size is around 5-6 regardless of race, anything above that is rare.
Even when you watch those amateur homemade pornos you'll see that the guy is no where near as big as a pornstar from bangbros or reality kings.