Which set me thinking - is it the contagion of laughing, the fact that we are doing it together, that makes the difference? I live alone, and rarely laugh out loud when I'm on my own. Something has to be hilarious to set me off on a guffaw by my solitary fireside. Would I be more inclined to giggle if there were someone else watching, or listening, or reading with me?
So I've a little experiment. Here is a clip which always, even when I'm alone, makes me crease up. I think it's the sound of other people helpless with laughter that gets me going - rather than anything to do with the comment that set them off.
It's an audio-clip (and about cricket, but please don't let that put you off. Indeed, it is almost the point - if you know nothing about cricket but this still makes you laugh, then that confirms my suspicions!)
So - does this make you laugh? (If the link won't connect, it will work if you cut and paste it into an address bar.)
http://cricketcrowd.com/displayvideo.php?ccvideo=2443
And, if this doesn't make you laugh, what does?
And, if this doesn't make you laugh, what does?