Perverse sexual lust
From Webcomic Wiki
Perverse sexual lust (usually abbreviated PSL) is what webcomic readers sometimes feel for webcomic characters.
The term originated with a reader poll run by David Willis asking why Joyce was such a popular character. One of the alternatives was "I harbor perverse sexual lust"; it collected a large majority of the votes. Use of the term spread from the Roomies/It's Walky! forums to many other webcomic forums and it has even appeared in some comics as an inside joke.
