We learned everything we needed to know about our skeleton in kindergarten . . . Recall a section of the lyrics from the children’s song Dem Bones:

“The ankle bone's connected to the leg bone,
. . .
The leg bone's connected to the knee bone,
The knee bone's connected to the thigh...

At 38, my doctor diagnose me with severe (grade 4) bone-on-bone left hip osteoarthritis. Since I was too young for a joint replacement, he advised me to reduce my activity level and avoid any movements that hurt. When the pain was excruciating enough, and my activity limited enough, they would...