You might think that the weird kinetic sand videos you see on TikTok have rotted only the brains of humans. As it turns out, that isn’t the case.

This orangutan is obsessed with putting weird goos inside of other weird goos. He’s so obsessed, in fact, that he’s somehow trained the woman filming this video to do it for him.

What’s he getting out of watching this woman play with slime? Your guess is as good as mine, but given just how popular slime videos like these are on TikTok, it’s possible that it’s just something innate in our shared ancestry.

That, or we as a society have fully devolved back to monkeybrain.