Research Why aren't the Japanese having sex? (Too many hikikomori?)

[Magical Realist]

No you didn't. You said this:

Well, there's no accounting for how homosexual sex is depicted in movies.

I wasn't talking about that, yet you bring it up as somehow making my knowledge of how sex is depicted in movies limiting. It isn't. I share in all the knowledge about what sex is regardless of my orientation. I understand heterosexuality as well as homosexuality. And I don't have to commit a crime to make moral judgments about criminals.

[Syne]

If you have no personal experience with heterosexual sex, how would you know how well/poorly it is depicted?
Just like I can't tell how faithfully gay sex is depicted. Now, maybe you had some experimentation with heterosexual sex, but presumably not enough to have any positive experiences.

Having experience with heterosexual sex, I don't find the depictions in movies terribly disparate from real life. Likely because, as a man, I largely lead the interaction, so I am responsible for what I make of it. Now, there's probably plenty of heterosexual men who don't realize that.. or don't have the stamina/will power to make it happen. But that doesn't mean the movie depictions are completely unrealistic.

[Magical Realist]

If you have no personal experience with heterosexual sex, how would you know how well/poorly it is depicted?

I've already given you 3 analogies for how. You don't need to be an addict to understand how drug addiction is depicted. Nor crime. Nor soldiers in battle. Nor any other type of human behavior. We are all exposed to the ins and outs of sex and romantic love from childhood. We see it in our friends and siblings and parents. And we read about it in novels and in movies. Thru all that knowledge and empathy I get to judge whether it is depicted accurately or not. You could do the same with LGBT sex and romance too if you had exposure to it in real life and books and film. But lacking the capacity for empathy and being homophobic, you probably wouldn't be able to understand it well enough.