Yes woman in skirts are quite appealing, and sex with them on is very hot, though i personally prefer the nude body of a woman when having sex i like to see her body not have it covered up with any piece of clothing
...And they are more practical to hide self-bondage ...
I don't have a skirt fetish but I love to wear a skirt without panties on. Another thing I enjoy is to take my panties off under my skirt while on a date. Then I discreetly hand them to my date. I've done this often enough that my boyfriend gets excited every time he sees me in a skirt.