Also know, is it illegal to not wear pants in public?
First of all, if 'pants' are taken to indicate underwear, it is not illegal to not wear them, provided you do not expose your genitalia, by their omission. If we are referring to 'trousers', there is no issue about not wearing them, provided there is no act of indecency caused.
Similarly, is it OK to show your underwear? “Don't Show Your Underwear” is a standard bullet point on most explicit and implicit dress codes. This applies to both men and women; men should not wear their pants below the waistband of their boxer shorts, and women should not wear tops that show off the polka dots on their bra straps.
Similarly, you may ask, is driving in your underwear illegal?
Generally, being naked in your car isn't necessarily against the law. Although naked drivers are sometimes arrested, it's usually for something other than just being naked.
What happens if you do not wear underwear?
It reduces the chances of irritation and injury
This can cause irritation and even injury, which may lead to infections if they happen often or are left untreated. Wearing a loose, comfortable pair of jeans or shorts without underwear can actually reduce chafing to your genitals.