Tesla CEO Elon Musk likes what he likes and he does not care if it changes his life expectancy.

Author Daniel Crosby tweeted that his life has changed since he stopped drinking Diet Coke and it caught Musk’s attention.

“I used to drink tons of Diet Coke but it’s been one month since I’ve had a drop,” he said. “I want to share some of the changes I’ve observed in myself over that time: My health is unchanged. I’m less happy. My one source of joy is gone. Thanks for encouraging me on this journey.”

Musk responded, saying “Diet Coke is amazing, especially the soda fountain version at movie theaters with salt & butter popcorn.

“There’s something special about enjoying movies in a theater with total strangers. I hope that never goes away,” he said.