I Don't Get It

Why is it that people continually leave their children ALONE in HOT CARS? It seems that every time I turn on the news I am listening to a reporter describing another incident in which a dad, mom, grandfather, grandmother, babysitter, etc. has forgotten about his or her child and has left them locked in a hot car to swelter, burn and eventually die. How can one forget his or her child? I cannot even begin to wonder what is so incredibly important in the minds of these caregivers to have their little ones erased from their memory for even just a few minutes. That's all it takes...several minutes in the sweltering summer sun...for the body's core temperature to reach the fatal limit of 107 degrees F. - Several minutes of a child crying out, helplessly wondering where mommy or daddy has gone. Several minutes for the child's organs to begin to fail due to intense temperatures inside a smoldering car.
I just don't get it.