I actually know a guy like that. He'd drop, pardon this Tagalog swear phrase, "Put--- Ina," every few words (meaning "Your mother's a who--" *flinch*). His every line seemed to have a double exclamation mark at the end.
And then he got married. And then he had a daughter. And then his daughter got to an age where she parroted everthing her parents said.
He cleaned up his language virtually overnight