James Thurber: I loathe the expression What makes him tick. It is the American mind, looking for simple and singular solution, that uses the foolish expression. A person not only ticks, he also chimes and strikes the hour, falls and breaks and has to be put together again, and sometimes stops like an electric clock in a thunderstorm.
But watch out, this is a liquid you want to keep far away from your mouth. Tea tree oil is dangerous if taken by mouth. It can cause serious side effects such as confusion, inability to walk, unsteadiness, rash and coma, says board-certified dermatologist Dr. Janet Prystowsky.
1 Using large quantities of tea tree oil on the skin could cause severe side effects.  For topical use only. Tea tree oil must never be used in the eyes or swallowed. Even in small amounts, swallowing tea tree oil could potentially cause severe reactions, including severe rash, nausea, confusion, and coma.