How to know if something is funny.

My father is my humour litmus test. Only the dry wit of an engineer can give a reliable assessment of the true humour of a situation. If he chuckles, that is good. If he laughs out loud, that's even better. But when he giggles, I know the joke has hit its mark.

I present to you, a giggle-worthy image.


[a play on " oh the humanity", for those who don't know what this is referring to]