You have to feel sorry for the people still stuck in the Zuckerbergian cesspit that is Facebook, spending their days wading through tedious political arguments and “SHARE IF U AGREE” shitposts written for the paste-eating crowd.
Unfortunately, the platform’s rampant misinformation is not limited to politics. Here’s one of the latest viral posts:

And this is what it looks like now, to protect people like your aunt who keeps sending you email forwards about Pizzagate:

Whenever I encounter stuff like this, my first instinct is to dismiss it as nonsense no one would actually believe. Then I remember our dubious track record when it comes to critical thinking: a third of millennials are flat-Earthers, one in four Americans thinks the sun orbits the Earth, and more than 16 million Americans believe chocolate milk comes from brown cows.
Some futurists and ethicists thought the world wide web would bring an end to conspiracy theories and outlandish beliefs, with the sum of human knowledge at our fingertips and the disinfectant power of the truth. But falsehoods have remarkable staying power, and the internet is happy to oblige any conspiracy theory no matter how far removed from reality, with sites like this one that says it offers “no-bullshit truth”:
So at the risk of stating the obvious, purring has nothing to do with a cat’s heartbeat, and cats experience all the same primary emotions we do (happiness, sadness, fear, excitement, nervousness) as well as quite a few secondary emotions, like jealousy, disappointment, contentment and confidence.
The idea that animals like cats and dogs are emotionless automatons went out of favor more than half a century ago, and modern technology has made it possible for scientists to peer into the minds of our domesticated friends and witness brain activity that mirrors our own when we process emotions. There is no debate: Cats have very real emotions, which is another compelling reason to treat them well.