In Buddhism, male-male sex only resulted in a slap on the wrist. Despite recommendations from the Council for Human Rights Promotion, the National Diet has yet to take action on including sexual orientation in the country's civil rights code. See also: Between 2 and 11 percent of human adults report experiencing some homosexual feelings, though the figure varies widely depending on the survey. Having lived together all these years, they truly deserved to be emulated as models of the way of love for all who loves boys. Blanchard hypothesized that some of these antigens promote the development of heterosexual orientation in males Although technically of the lowest class, this trickle-down effect began with the merchants, as their wealth allowed them to take on servant boys and apprentices without worrying too much about the financial burden.
I came upon this information while researching an article still to come about the current state of the LGBT community in Japan.
There are several possibilities, but I found the two below most plausible. Lesbian-romance themed anime and manga is known as yuri which means "lily". Christian priests weren't supposed to partake in heterosexual activity, but male-male sex was a crime for which one could be severely punished. These actors were highly sought-after by both men and women.
Part of the answer lies in the Kojiki —here's an excerpt in which the deities Izanagi and Izanami create the islands of Japan by, well, totally doing it.