Dictionary time. Legit is slang for legitimate. The noun is legitimacy.
Originally Posted by papadee
"I give you now Professor Twist,
A conscientious scientist.
Trustees exclaimed, 'He never bungles!'
And sent him off to distant jungles.
While camped on a tropic riverside,
One day he missed his loving bride.
She had, the guide informed him later
Been eaten by an alligator.
Professor Twist could not but smile.
'You mean,' he said, 'a crocodile.' '
Okay.
Legitimate is the standard adjective, and
legitimacy the standard derived noun. By the same token,
legit is a well-recognized slang equivalent adjective, and
legitness will certainly serve as a well-recognized slang equivalent noun.
Now, at the risk of committing a thread drift, concerning penile images: I can only go by two professional ladies with whom I'm well enough acquainted that we have regular email correspondence. In both their cases, not only do they
not demand dick pics, they explicitly demand an absence of dick pics. They would pretty nearly pay you to
not send dick pics. I believe sending a dick pic would be a fast and reliable ticket to their do-not-see lists. And if I ever approached a working woman who demanded or requested such an image, or even suggested that such would be welcome, I would immediately know that she and I would not be
sympatico, and I would disappear "wit' a quickness," as they say.