I found that hanging around with other DINKS has helped for me. After five years of TTC, I am getting to the point where I can imagine a childless future. I have to admit though that getting away from the heavily 'family' based culture of suburban Australia did help in this (we had lived in a rural town in Queensland and the suburbs in Brisbane). We moved to London last year and when I think about it we have met lots of people around the same age as us who also have no children. People with children also exist here of course but we seem to not run into them much!