An all-women theater group has found an ingenious way around a sales tax increase that is crippling Spanish theaters - by selling pornography.

The group registered as a distributor of pornographic magazines earlier this year after getting hold of around 300 back issues of a discontinued erotic magazine.

The Risk Premium Group now gives a free ticket to its production of The Prodigious Magician, a 17th-century drama by Pedro Calderon de la Barca, in Madrid, with every 16-euro ($20) porn magazine it sells.