It's actually a very complex question- when you're asking about porn, you're asking about their attitudes towards sex, gender, and technology.

Like, will they be shocked by the nudity? Or is the nudity a non-issue, but they're uncomfortable with the sex? Or maybe sex is just a pretty normal thing, but they find the different positions and scenarios alien (Anal? Blowbang? Schoolgirl/teacher?)

Also has interesting implications for how they view western nations. Like, "our women would never do that, but I guess American women are all like that!" kind of thing.

The technology aspect is very interesting as well- I'm guessing most Massai don't have personal computers. Maybe they do like porn, but only have some old Playboys? Maybe they have homegrown Massai porn?

In the absence of porn, what are their sexualities like? Are they more or less conservative than various nations with access to porn? Are they more or less accepting of homosexuality? Is not even something worth caring about?

Their answer was actually extremely interesting.

They don't believe it and don't know what it is. Don't think or know about pornography.

So, it's incredibly foreign to them.

They are asking is it normal in America.

Lack of knowledge about America means that this is a legitimate question- America is such a strange land that anything could be possible. Maybe in America it's normal to be gangbanged.

They just saw recently on phone, think it is photos of things that are not real.

Not sure exactly what they mean by this, but I'm guessing it's like how we reacted to 2 Girls 1 Cup- "This is insane, there's no way this is real, what the fuck," etc

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tl;dr stop being a twat, it's an interesting question