once upon a time, i had a shop at a medeival ren faire. alot of the guys wore kilts. one day a friend came by and asked if i had ever made a "willie-warmer" he explained that some of them did winter faires and it could get cold under the kilt. so i got the instructions and made some up. they all sold.
for those who may not understand, the guys that ware the kilts. some of them go(what is called regimental), the dont ware anything under the kilt. thus the "willie-warmer". havent made any since. it was fun though.