I was looking something up on the web, & came across Piriformis Syndrome.
Naturally, I had to check it out, because I knew there would be Piriform addicts like me.
Unfortunately, it turned out to be not what I thought it to be.
Turns out, it's not a Piriform addict, after all: -> http://www.lower-bac...piriformis.html
(And has no relation to Piriform that produces CCleaner & great apps.)