Not just that. It's realizing your family member isn't there anymore, even though they are sitting, living and breathing, in front of you.
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Unrelatedly if you're going to let an iguana climb up your legs, make sure to wear long pants or jeans. Speaking from personal experience. I have also learned that otters are capable of untying your shoelaces and they will try to remove your shoe from your foot so they can steal it.