Damon Runyon does not talk like Squiggy and Lenny. He tells us his stories in a mimicry of the voices of the people he writes about.
Squiggy and Lenny were not self aware, (and neither are many of Runyons characters) they held a very limited world view that did not include other people's needs or cares. (and neither do many of Runyon's characters.)
We often don't care at all about Runyon's characters-- nor can we care much about Squiggy and Lenny. We do get to know and care about about Runyon's main character, which is the guy that's telling us the stories in the first place. That guy is self-aware, compassionate, observational, acute, and sometimes uplifting.
I will say that your observation that men often are lewd without being descriptive is a very good one. It's not so true any longer, what with the internet and stuff.
BTW, Have you ever noticed that the men who really detest women-- and the women who really hate men, like totally hate them-- are heterosexual? That's so sad.
Stella, I knew I loved you, but Damon Runyon, be still my heart *smile*. I am one of the few people under about 75 who know Runyon and loved his stories, they were often my good night stories as a kid......Runyon was often accused of gold plating villains, because so many of his characters were based on real people, some of whom were not so nice. The irony of Runyon is that these tough, some nasty people, can do the right thing or good things, often without knowing it, while the good people, especially the bankers and such, don't.....
My favorite? Hottest guy in the world, after Big Jules shoots the gorilla that has taken a baby and is on top of a building, that saves the babies life, and he find out it is his hated cop nemesis baby, tells him "well, copper, it wasn't so easy, and I am not surprised to find out he is your kid, for to tell the truth, I have a had time telling the baby from the monk"
. It's merely an observation that a)intelligence has nothing to do with education and b) that people who are very well-read tend to have good grammar. The examples that you have brought up is more linguistic patterns than grammar. It's almost a separate dialect.