Young Brunette Girl Wearing Undergarments At The Mirror At Home

Not wearing underwear under one's outer clothing is known in American slang as freeballing for men or freebuffing for women; in addition, the term going commando is used for both sexes. Some people chose not to wear any underwear. People chose not to wear underwear for reasons of comfort, to enable their outer garments (particularly those which are form-fitting) to look more flattering, to avoid creating a panty line or because they find it sexually exciting, or because they do not see any need for them.
The practice is not without its risks, particularly for women, some of whom have been the victims of upskirt (or up-shorts) photographers.
Certain types of clothes, such as cycling shorts and kilts, are designed to be worn or are traditionally worn without underwear. This also applies for most clothes worn as nightwear.