Laughter is a funny thing. Pun intended, sorry. Although it is possible to have a good laugh on your own, it is generally a social thing. I am certainly capable of having a proper giggle fit, but am aware when I do so that I am capable of stopping if I choose to. The purpose of laughter would seem to be social, and I have never had a giggle fit on my own, have you?
The last giggle fit I had was when I showed my bro-in-law the encyclopedia dramatica 'offended' page (link is to old version - they seem to have taken down all the images). He scrolled down through the images, mostly unpurterbed (he's prob not NT either!) and then stopped at this one:
We both started giggling...
