Be careful- your fella's bits are set to shrink down as the cold weather continues its hold on Ireland this week.
As the temperatures drop, a man's penis will shrivel up to 50 percent in length and 20 to 30 percent in girth! So half of his manhood will just disappear in the cold.
The scrotum, testicle area, will also change its size and get smaller during the freeze.
The scrotum contracts to help protect the testicles in order to produce sperm. So, "shrinkage" is certainly necessary for the health and well-being of man. But, yes, it still gets smaller ladies.
A health expert warned the penis will half in size if it exposed to any air temperature below 60 degrees.
Darius Paduch, the director of sexual health and medicine at Weill Cornell Medicine, said: “When you’re cold, your blood vessels constrict, which limits blood flow to your penis. This causes it to decrease in size.”
The change in sizes comes from reflex called the "cremaster reflex", which brings the testes up closer to the body when they're cold to protect them.
The reflex can also drop them down a bit when a man gets hot, again this is to keep the temperature right for making sperm.
It is all science!