A dance belt is a kind of specialized undergarment commonly worn by male ballet dancers to support their genitals. Most are similar in design to thong underwear. body-hugging ballet tights would otherwise reveal the contours of the male. Aug 3, - Dancers are taught from an early age (six or seven, sometimes earlier it was the tiny tot classes for my daughter) to not wear underwear with their tights and leos for ballet class. What is the reason for ballet dancers wearing tights? Even from a young age, ballet dancers don't What do ballet dancers wear under their tights?