There's actually a really, really good essay on the attitudes of homosexuality and anime that's extremely self-aware in a way that's almost refreshing.

...it's also seven fucking years old, so that might explain it. The past really is another country.

TLDR, it goes into elaborating how Japanese society, despite being very conservative(in the old sense of the term) in alot of ways can have a specific tolerance of homosexuality in things such as anime and manga;

The short answer is that anime reflects the tolerant attitude that a society can have towards what Fred Reed referred to as “baroque sexualities” when they represent no threat to the prevailing heterosexual order. This, in turn, reflects the tolerant attitude that can be had towards any minority – whether it be a lifestyle minority, an ethnic minority, a religious minority, or a political minority – when it is below a certain level of prominence in that society.

Overall, the essay is a good rebuttal to disingenuous faggots trying to shoehorn gay stuff in as 'regular and normal'.