Why do penises get smaller in cold water?
In: Biology
The majority of the penis is made of erectile tissue. Erectile tissue, the one that “hardens” when the penis is stimulated, runs on blood flow. Blood flow is dependent on the caliber or diameter of the blood vessels in that area. Blood vessels shrink when exposed to cold temperatures—this is why people tell you to put an ice pack on a bruise or a sprained ankle, to help with the swelling. Shrunk blood vessels permit less blood to flow, thereby preventing blood from “powering up” the erectile tissue. This causes the penis to even “shrink” to a size smaller than when it’s in room temperature.
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