Knitting fan Radmila Kus is running up a fortune from the ultimate in luxury crotch-et work - made-to-measure bespoke willy-warmers.
Kus has revived a centuries old tradition in Croatia's remote Mrkopalj mountain region where wives knitted protectors to help their husbands cope with the area's freezing weather.
Kus explained: "Local men here wore these for centuries. In those days the clothing was not so good and people weren't rich enough to keep warm.
"Frostbite was a real problem and to avoid permanent damage these warmers came into use.
"Wives believed that keeping their man's private parts warm allowed him to remain fertile and increased their chance of having children," she explained.
"Of course they would make them to measure which is what I am also doing. But if people are shy, they can provide me with the measurements they've taken themselves,' added Kus.
Now the £7-a-time warmers have become so popular she's recruited a small army of knitters to keep up.
"I used to make slippers for tourists but these willy warmers are so popular I just can't keep up. I guess people can put up with cold feet as long as everything else is warm," said Radmila.