How conservative the Japanese people really is? And the government?

They were very similar to the bromance of today but accompanied by sexual intercourse.

They don’t bring around their mates everywhere, which means they don’t worry about being single, gay, or whatever because no one cares about whom others are having/ not having sex with.

They don’t tease or beat up cross-dressed people on the road.

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In the old era, gay relationships were very common and were even praised among the privileged social classes, such as Samurai and monks.

Visual-kei

“None of my business” is the common attitude.

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I’ve heard it’s always the male side that is expected to take a move in some countries. It’s not the case in Japan.

I sometimes feel people from the West are obsessed with those “gender” and “sex” things too much. Let’s think about something else sometimes. It’s unhealthy.

They don’t have the so-called “couple culture” seen in many Western countries.

What does it mean when a guy says he doesn't want to ruin the friendship? Is he rejecting me or is there another explanation? Why would a guy choose not to risk the friendship if he has feelings for me?

Moreover, buff guys are often avoided for their narcissism.

We don’t instantly tie it with sex when a father and his very young daughter are taking a bath together.

It’s very common for a girl/ woman to ask a boy/ man to be her boyfriend.

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How do you see these below?

Yaoi

This is a very vague question. But considering the asker’s comment on Mr. Nakajima’s answer, your interest seems to be in sex-related matters (I don’t think it’s the only indicator of conservative/ progressive, though).

Why do ugly men flirt with girls that are really hot?

They don’t have the value that “guys must be macho.”