We are named after the one thing with what we do not associate ourselves. Rest assured, atheist was originally a slur dating back way before the birth of atheism (1728). People did not call themselves atheists for centuries. Also, I would not define myself as atheist any more than an atoothfairist.
The tip is inversely proportional to the time of service, and directly proportional with pleasantness. Come on! I can make an almost good portrait (photo) of you in a couple of hours, by many shots and some luck. A pro portrait photographer will take a stunning pic in significantly shorter time. We pay to the staff for their expertise and for our time not wasted on the service.
If an adult drinks a coffee, its effect wears off in about four hours. When a child drinks a coffee, it takes about twenty hours to get rid of it. Children are not miniature adults, their body chemistry is different.
An adult’s body gets rid of the caffein consumed with a cuppa in roughly four hours. A child consuming the same amount of caffein is on caffein for 20 hours. An energy drink at 10 am. wears out at 2 pm for an adult, and, for a child, next morning about 6 am.
Actually, the point of the pics IS humans killing birds. Text and artwork together carries a message about our hypocrisy.