Today I saw a guy wearing a T-shirt that says “die laughing”.

If you die laughing, then your mouth would be open. Passersby would say,

“Look at that guy, he looks like he was sleeping with his mouth open drooling

and just died.” Hardly the desired effect.

"When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things."