Hieroglyphs are actually not that simple, my ex gf was an Egyptologist, I went to quite a few lectures with her, that was a highly complex language, more akin to Japanese Kanji, with deep layered subtexts. Those desert dudes were crazy. If you have ever have a chance to visit a lecture about hieroglyphs, do it, it’ll blow your mind. Or how they calculated time, or even saw it, culturally and individually, wow. They were so unbelievably far ahead, I sometimes compare them to the octopus of human development, they should rule the world, but there was that one thing, that prevented it. (For the analogy: the octopus dies when their kids are hatching, would they have the ability to pass their knowledge along to them, today eight armed space suits would be en Vogue)

Of course this isn’t comparable - hieroglyphs form complete languages and are not just a set of emotion symbols. Probably there’s one or two that are emotions but I somehow doubt that the stone writings that endure contain any personal expressions of emotion.

But the post is funny and it hints at something important. Expressions to co vey emotion are incredibly important to human beings. It’s a language that our bodies are physically built for: our faces are far more changeable and expressive than other animals, and this supported the social bonds and cooperation that put us on top of the world. I’m not saying that across all cultures, one given facial expression means the same thing, but certainly all cultures have a vivid, silent language of facial expressions that is so deeply rooted, we barely think about it.

There’s an entire code block for hieroglyphs in Unicode. https://symbl.cc/en/unicode/blocks/egyptian-hieroglyphs/

Amusingly penis features in a few of them. https://symbl.cc/en/130B8/