They serve to keep outer garments from being soiled or damaged by bodily excretions, to lessen the friction of outerwear against the skin, to shape the body, and to provide concealment or support for parts of it. In cold weather, long underwear is sometimes worn to provide additional warmth.

Why is it important to wear clean undergarments?

Comfort. Well, a clean and hygiene innerwear gives more comfort personally to the individual who wears it. According to Hygiene For Health, dirty underwears can harbor microorganisms, and wearing undergarments with these microorganisms on them can lead to skin infections.

Why did people start wearing undergarments?

Underpants or drawers, known colloquially as "panties," were first worn during the Renaissance for function but were also used as a chastity device. They were described at the time as "helping women keep clean and protecting them from the cold, they prevent the thighs being seen if they fall off a horse.