According to Google Trends, it was most popular in 2004. I've already heard of the BME Pain Olympics so this being a meme doesn't surprise me.

Ahh that's where i initially saw it... most of those videos still roam the net as if they're as common as fairy tales and folk lore.

Are you sure you didn't want CBD instead? *cough*

Is that the joke? I want both... at the same time.

It was a neat surprise to, once upon a time, discover it was a 'thing' and not a unique aberration of mine. The CT doesn't do anything for me, but the ballbusting? Oh yeah.

I have a fairly good idea of how it happened. A combination of mis-interpreting (?) 'resistance', dealing with some (non-relative) testicular abuse/play just as puberty hit. The result is... a long-lasting interest. And perhaps there is some resistance built up over the years.