Underwear fetishism is a sexual fetishism relating to undergarments, and refers to the sexual excitement which some people experience from observing or handling certain types of underwear.
Some people experience sexual excitement from wearing certain types of underwear. Other people experience sexual excitement when observing or handling certain types of underwear worn by another, or watching somebody putting underwear on, or taking it off.
As well as this, other people experience sexual excitement from printed or electronic material which includes underwear.
Underwear fetishism is not considered as paraphilia unless it causes distress or serious problems for the person or those associated with him or her.
A paraphiliac is someone who is sexually aroused by objects, situations, or individuals which aren’t part of ‘normal’ sexual stimulation
Panty fetishism is a paraphilia in which one eroticizes panties (or similar styles of underwear).
Fetishistic behavior can involve sharing printed or electronic material depicting exposure of panties, usually of a softcore nature, or direct sight and physical contact with the panties.
Some individuals have a paraphilia for a specific type of panty. For example, a common subclass of panty fetishism are panties that show the exposed buttocks (i.e. thongs and g-strings).
Some individuals have the opposite preference, and are attracted to panties that cover the buttocks.