Forced bed wetting is an activity engaged in by dominant and submissive partners during a fetish scene- specifically the dominant partner forces the submissive partner to wet their bed. This might be accomplished by restraining the submissive partner or simply through the dominant ordering the submissive to do so.
Forced bed wetting can be used in erotic humiliation scenes where the purpose is for the dominant partner to degrade and humiliate the submissive or it might be used in adult baby play where one partner takes on the role of baby.