Freddie Prinze Jr: I Can Now Change a Diaper in "46 Seconds"

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Freddie Prinze Jr. has learned one valuable lesson since becoming a dad.

How to change a diaper.

"I've changed diapers. I'm good at it. I'm fast," the actor, 33, told George Lopez on his late-night show Tuesday. "I can time myself -- 46 seconds!"

The 24 star and wife Sarah Michelle Gellar welcomed their first daughter, five-month-old Charlotte Grace, in September, and he admits that diaper-changing is the only skill he's acquired.

"That's all I got," he said on Lopez Tonight. "I just tried to work the car seat. You've got to, like, adjust the seat belts. 'Adjust the seat belt' is so much more complicated than what my brain can handle."

Perhaps the reason he can't grasp car seats has to do with his own childhood.

"I was never in one," he said. "My mom drove like Britney Spears with the steering wheel and me right here [in her lap]. I'm fine. I turned out okay. We had a Volvo."