most woman in adult entertainment dont get aroused enough to take some of the bigger dicks without probs.
They are just playing as if they like it. They wont just get wet and excited on the sight of a huge dick

. And some said they would never date a guy like mandingo (pinky sara jay) as they wouldnt want it everyday.
If a woman is aroused enough then her vagina naturally enlarges and lubricates more then usual.
It appears as if some spots like the anterior fornix only then become available or comfortable to be hit.
It isnt enough
to have a big dick. Comes greater responsiblity wth it