In case you weren’t aware, penis warmers are a thing. News has recently spread of a Croatian housewife who has built a business producing made-to order ones, which have apparently become quite popular as funny gifts.

However, at one time, they were actually used by men in the Croatian mountains who genuinely just wanted to protect their junk from frostbite. Radmila Kus, who has orders coming in from all over the world, told International Business Times, “Penis warmers used to be worn in these parts as a normal clothing item for the male private parts because the winters were very harsh with very low temperatures.” Apparently, they did something that regular underwear just couldn’t accomplish.

Now, they’ve become more of a gag gift and it turns out Kus isn’t the only one making them. There are in fact a wide array of penis warming options available on the internet–from Rasta “Willie Warmers” to “Weenie Warmers” with political themes to “Penis Puppets,” which come in animal shapes. You can even customize your own in some cases.

How long do you think before Karl Lagerfeld starts doing them?

Source: fashionista.com