What are petticoat discipline stories?

Petticoat discipline stories are a sub-genre of erotic literature that primarily deals with the forced feminization of men via dressing up in girls' clothing. Generally, in pinafore eroticism, it is a dominant female character who is forcing the male to dress up, to create a situation of humiliation.

Men in petticoat discipline situations are generally dressed in extremely feminizing garb. Bras, panties, petticoats with ruffles and other "little girl" items are usually employed as well as accessories, such as makeup and handbags. Under this form of forced transvestism, usually a public display of the dressed man creates humiliation, and in erotica, sexual tension.