So why the gray hair? “The graying of hair and wrinkling of skin seen in presidents while in office are normal elements of human aging; they occur for all men during this phase of life and can be accelerated by behavioral risk factors such as smoking and stress,” Olshansky wrote.

“You take a picture of anyone at 55 and then another picture at 59 and then another at 63, you are going to find that every single person experiences aging,” he added in a telephone interview.

“My response is simple: Join the club. The good news is that we don’t die from gray hair and wrinkled skin. I personally wear my gray hair and wrinkled skin proudly.”