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Last year, I had both of my knees operated on. Arthroscopic surgery to remove a bunch of build-up, and something called a 'lateral release' (cutting the ligaments) was done to both knees, to allow the patella to move correctly. Well, one thing I have noticed (less now than the months immediately following the surgery) is that when I stop walking, it feels as though the muscles in my thighs right above the knees are still moving back and forth. Not like excess body fat jiggles, but more as if I had animate jello creatures living above my knees. It's not painful, but it feels really weird, as if part of my leg is about to fly away.

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Put a Hershey's® kiss on the back of your tongue, and drink a cup of good hot coffee, and feel the chocolate slowly melt down your throat. It's a neat taste sensation and feels.... interesting.

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At least once in your life, sleep naked on fur. Even if it's fake fur. Pet hair on the bed doesn't count.

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This isn't really a weird sensation, but I like it all the same. I call it "The Human Swamp Cooler". Just take a quick rinse with cold water, don't towel off, and lie under a working ceiling fan. It's just a bumped-up version of the body's natural cooling system.