One of the most well known superstitions in connection with underwear is when someone wears their underwear inside out!
This has long been considered lucky. There was also the belief that if one was experiencing an unlucky day, the only way to turn it around was to wear underwear inside out!
It was believed to also be a sign of bad luck if an individual adjusted their underwear, especially for a man. There existed the belief in the late 1920's that if a bride wanted to secure a happy marriage then she would need to attend the wedding without wearing any underwear. This was because without underwear was believed to be a sign of wholeness and appeasement to the gods of love, who in exchange would bring joy and happiness to the couple's sex life.
Another popular superstition is in regard to sleeping with underwear. Apparently, if a women sleeps with underwear under her pillow she would dream of a future lover. To sleep with a bra under her pillow it was thought that she would see her eventual husband. However, if she slept with her underwear on and was pregnent, then happened to dream of passing water then it was an indication that the women would struggle to give birth.
There was also the believe that if one happened to walk on the leaves of a valerian tree then this person would be irresistible to the opposite sex. The tree was deemed to posses magical love potion to opposite sex.
If a young girl wished to marry they would borrow underwear from a married women, then wear it, this was considered lucky, let's hope they washed the underwear first!