Plots involving partners who end up in bed with each other by mistake are common in literature and legend. In folklore, particularly, these tales often concern the punishment of someone who has committed a sexual "wrong": the person of power who uses his position to extort sexual favors, or the spouse who mistrusts his or her mate's faithfulness without just cause.
Couple at Halloween costume party accidentally switches partners.
Cop who busts underage couple is offered his own daughter as a bribe.
Man receives unexpected inheritance after his friend beds widowed hotel owner.
Women pulls penis of visiting minister in the shower.
Woman unzips fly of mechanic working under car.
College student's cyber-lover turns out to be her father.
French playboy discovers the woman he's been romancing on the Internet for months is his mother.