Generally, a married guy (or one heavily involved with a SO) will be more concerned about cleaning up, afterwards, especially if he's going immediately home after our appointment.
It's not the unmarried guys are unclean.
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But I have noticed that an unmarried man will not have some of the same concerns of getting caught, or whatever, that a married man might have.
And sometimes, guys lie about their marital status. For what reason, I don't know. So when someone tells me that they're single, I do take it with a little salt.
Doesn't matter at the end of the day to me. I just like them all. Each are unique. Some married men are easier going than an uptight single guy.
Never know. Chemistry plays such a large part. Even with the actions of any individual afterwards, or before. Or during.