The picture below has 2 identical dolphins in it. It was used in a case study on stress levels at the Mayo Clinic and later at Fletcher Medical Center in Burlington.
Look at both dolphins jumping out of the water. The dolphins are identical. (PhotoShop copies) A closely monitored, scientific study revealed that, in spite of the fact that the dolphins are identical, a person under stress will find many differences between the two dolphins.
The more differences a person finds, the more stress that person is experiencing.
Look at the photograph and if you find more than one or two differences you may need to take a vacation.