Well, yoga started off as a sex cult, which doesn't get a lot of presence in the marketing brochures. But it should. A lot more men would sign up. Hatha yoga — the parent of the styles now practiced around the globe — began as a branch of Tantra, notes William Broad in the New York Times. Practitioners were often accused of using spirituality for sexual debauchery. It was only last century that the fitness image of yoga came into play.
There may be physical reasons why yoga makes people horny. Read the NY Times article for the latest research and maybe learn how to become a guru and prey on womens' self-esteem to get sex and get rich doing it.