It's not really a joke in some places:
"An enterprising association of sex workers in Barcelona has angered some of
Spain's most prominent feminists by offering an "intro to
prostitution" course in response to what its members say is a growing number of women turning to sex work in the wake of Spain's financial crisis.
At a cost of €45 (£37) a person, the four-hour intensive course for aspiring sex workers was held last month by the Asociación de Profesionales del Sexo, a group of eight sex workers who lobby for better rights for those in the industry."
http://www.theguardian.com/world/201...conomic-crisis