Why a typically rude guy would suddenly start showing good manners?

There's a guy who's known for being disrespectful towards women and I called him out on it one afternoon, telling him in a very calm but direct manner that he just doesn't know how to treat women.

Suddenly every time he sees me he gets up out of his seat, He's careful to show off all his best manners, etc. It makes me chuckle a bit because it's so out of character. Everyone is noticing the transformation and commenting, crediting me for it, but I hardly think that's the case.

Just wondering what brought this transformation about.

Updates
8 mo
I’ve done that but he very often says one thing and does another. It’s not clear what his issue is.
Why a typically rude guy would suddenly start showing good manners?
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