Pantyhose and nylon fetishes are a relatively mild sexual fetish of womens pantyhose. Men often find sexual partners wearing nylons/panyhose more desireable based on the sole fact that she or he is wearing them at all.
Typically the fetish is first encountered during early formative years of childhood and is often if not always related to a specific 'role model(s)' such as an older sister, aunt, neighbour or friend whose legs and pantyhose are attractive enough to trigger an initial random curiosity that can and often does result in increasing admiration and envy. Many will then become inexplicably driven to obtain the pantyhose from a trash bin, linen basket, bedroom etc.

The fetish relates strongly to stocking fetishism, the distinct sheer and absolute feminine appearance of them being the common denominator. Many males preference for pantyhose above nylon stockings may be related to the fact that they are in (almost) direct contact with female genitalia whilst also covering more of the female form. They are now believed to be the third most popular clothing fetish item.
In adult life - males with this fetish, not unlike many other fetishists, will be predominantly respectable and responsible, heterosexual family guys. Many for whatever reason innocently enjoy admiring womens pantyhosed legs and/or wearing pantyhose themselves, perhaps this latter need being reinforced over recent years as women have, somewhat ironically, disguarded their skirts and pantyhose for that most traditional of male garments; trousers. This may also play some part in explaining the significantly increased occurrence of cross-dressing behaviour patterns/aspects of fetishism now being 'explored' by men.
The typical pantyhose fetishist is not unlike most men who 'cross dress' to whatever degree or for whatever of many possible reasons. He is deeply worried and concerned about being associated with homosexuality or transsexuality, and therefore seldom wears in public although pantyhose fetishists will often wear pantyhose under their trousers/socks or simply wear traditional male garments for 'peace of mind' and just content themselves by continueing to admire and envy their partners/women's freedom, and beautiful legs of couse!

In some instances the fetish can thus be sensual in the extreme whilst not being primarily sexual.