when a man sees something that his brain can't choose whether the image is arousing and terrifying, so his penis gets erect out of fear and arousal.
dude 1: when I googled thicc aliens last night I wasn't sure whether to be scared or aroused.
dude 2: well what happened?
dude 1: I got a spooky boner
by ProbablyADegenerate September 6, 2020
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