What is it about underwear and the word 'butt' that can make a three year old boy go into gales of laughter? Or when his dad tells him if he puts his underwear on his head then he'll be a 'butt-head' and the child giggles and giggles?
And why, since i'm on the subject, do boys grow into Men but never out of laughing at such things?
Believe me, when you're three, it's adorable. When you're 103 it's adorable. Anything inbetween?
Not so much.