I don't hate children. My wife and I just didn't think we would be good parents, and also by the time we got married in 1968, we were pretty nose-down toward what we wanted to do, and having a child was going to be an excuse to fail.
Tanks come in two forms: the dangerous, deadly kind and the 'liberating' kind.
Think about the photo before and after, never during. The secret is to take your time. You mustn't go too fast. The subject must forget about you. Then, however, you must be very quick.