Tired eyes get dry, and rubbing stimulates the lacrimal glands to produce more fluid. Tiredness also closes your eyes, so you may rub to keep them open. Finally, there’s a connection between the muscles that move your eyes around and your heart. When these muscles are stimulated, a reflex slows the heart.
Indigenous people of Mexico and Central America used the Nahuatl word āhuacatl to mean both “testicles” and “avocado.” The fruits were originally marketed as “alligator pears” in the United States until the current name stuck. For more random facts, learn what the original word for avocado means about guacamole’s name.