What’s happening when you think there’s a bug crawling on your leg, but nothing’s there?
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Your brain has the ability to filter what it thinks is not important sensation, called sensory gating — like how you don’t feel facial hair after a few weeks of having it, or not feeling your shoes constantly, etc. There are various optical illusions related to this function.
There probably isn’t anyone that fully understands what criteria is required before the brain passes data to the sentient thought portions, but it’s definitely affected by mood — like when people watch a movie with bugs in it and are creeped out and swear they feel them.
Chances are, some sensation your body would typically ignore failed the vibe check.
IE., sometimes it’s leg hair.
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