All parents are mean for a reason. As we grow into adults we know why our moms and dads were mean. Someday when my children are old enough to understand the logic that motivates a parent, I will tell them:

I loved you enough... to ask where you  were going, with whom, and what time you would be home.
I loved you enough... to insist that you save your money  and buy a bike for yourself even though we could afford to buy one for you.
I loved you enough... to be silent and let yo