A few of my friends and me went to the beach this past weekend. We all soaked the same amount of sun.
One person’s upper back got tan and not the lower.
Another person is tanner on the front of his body and lighter on the back, but that’s because he jogs in the mornings with his shirt off and shorts.
Also, why is it so hard to get some color in areas like the underside of the arms, breasts, thighs and stomach?