Mandingo bottoms out many girls.
For instance, in the dvd "Big Dick Mandingo Lil Freaks" he goes balls deep in all girls featured on it.
And in the following video you can see Bobbi Bliss deepthroating the entire fully erect dick of Mandingo till his balls.
Obsession & Bobbi Bliss vs. Mandingo & Byron Long - Blowjob sex video - Tube8.com
That's because he isn't 14" as he claims in his website. It's actual size is much less than 14".