In the short story
Go Carolina from novel
Me Talk Pretty One Day, author David Sedaris comically narrates his public school experience of talking with a lisp. Sedaris actually has a "lazy mouth," but as he conveys to us through his description of family life we see that he also happens to be gay. So, while his parents seem to associate his lisp with his love for cooking, cleaning and lack of interest in sports, the audience understands that his lisp is actually a physical barrier (and not another stereotype).
When reading this short story, teachers need to realize the prejudice being conveyed from the perspective of the narrator. While this book made me laugh hysterically, there was also an understanding that Sedaris had to conform to certain gender roles. While sports didn't interest him, he pretended to be interested anyway. In the article
Adolescent Gender-Role Identity and Mental Health: Gender Intensification Revisited, Heather Apriss, Sara M Lindberg, and Janet Shibley Hyde describe gender roles and the important social implications of such behavior.
http://www3.interscience.wiley.com/cgi-bin/fulltext/122597253/HTMLSTART