Geophagy means eating what?
Correct answer: Earth

Snance
Gross! I'm going to stick to food.

Globular Martian
I spent many years working with horses. They also do the same thing by licking soil. I have always believed it was because they lacked nutrients in their diet. We always provided a salt lick in their stable over the winter time.

Von-Lee
My mother told me that she ate red Virginia clay when pregnant with me.
No wonder I'm a little off in the head.

Da missus
loved a packet of chalk on pocket money day 💭👀

Coo
Yet another straight lift from Wikipedia. 😐

Som
I took a wild guess based similar word geology

Queen Esther
Ewww!! that is so disgusting!! uhhh hippies!!! that is disgusting!! like I love nature but not like that much like gosh!! bro!! chill!

Castra
Geophagus is a genus of freshwater fish of the cichlid family.
They don't actually eat earth, but they take mouthfuls of gravel and spit it out, in order to produce a "nest" to lay their eggs in.
After laying the eggs both the male and female guard the nest from predation.
They also guard their babies.
I've bred various cichlids and they're absolutely fascinating.