Rocker Pete Wentz keeps his language clean at home because his young son Bronx repeats everything his famous father says.
The former Fall Out Boy star welcomed his first child with wife Ashlee Simpson in 2008, and quickly learned not to curse in front of his quick-learning son.
He tells Us Weekly, "As a parent, I'm finally being able to get my mouth to behave itself as far as saying naughty words. He says everything!
"It's one of those things where he's so awesome, he just makes me smile. Even when he says (bad words) back it's like, 'No way!'
"He's becoming a human being. It's so crazy to watch something that was a baby become something so animated, so smart and so personable."