I Can Certainly Suppress My Giggles Until Wednesday.

https://www.jpost.com/omg/article-777435

But there is a point where it just becomes a bit sad really.

You can normally tell when you've arrived at it.

Cara Delevigne's there.

https://www.youtube.com/watch?v=AslM-H8Igrc&pp (The Beast In Me, Johnny Cash, I, Official Audio).