Do you wear underwear under leotards?

[Abnormal]

I came across a very interesting question on the internet regarding leotards, used for gymnastics, ballet...basically anything you can think of using a leotard for and what I want to know is: how many people(boys and girls) wear underwear under the leotards and how many people don't? If you do, why? If you don't, why not? Is it just a personal preference, decency, comfort? Does the place you wear your leotard require that you wear underwear or go underwear-less? What do you think the benefits are to not wearing underwear as opposed to doing so? Thanks for your time~. :D

[Luminous]

Gymnastics and I think ballet leotards are not supposed to be worn with underwear, but I guess if it's a thong nobody knows the difference.

[Melodic]

When I was in ballet, I wore them under