17 Funny Things People in the 1970s Were Totally Guilty of Doing

Putting faith in a mood ring

Mood rings were apparently filled with thermotropic liquid crystals, and their molecular structure would change based on temperature.

And you didn’t have to be a chemist to realize that your girlfriend’s ring always being blue didn’t mean she was the calmest human of all time.

If you want to know someone’s mood, then you should pay attention to how they’re behaving. Sure, it takes more time, but at least you’ll get a slightly more accurate reading than “Violet means excited!”