As its the sole preserve of women, I'd say there is a worldwide conspiracy of women to moan like buggery about the whole childbirth thing - Mrs flop was unbearable, and she seemed to get even worse when I suggested the pain was probably little more than a chinese burn and that she was wailing so much because she had a low pain threshold. Tut, nobody thinks of the fathers - I was in that damn hospital for 38 hours: have you tried getting any kip in the same room as a screaming women??? It took me a whole hour!!!
Now, pain - I had a different leg broken in consecutive seasons a few years back AND, one very very very cold Sunday morning I received a football at full blast right in the knackers - now that is pain.
Childbirth - could do that standing on my head. Quitely and with no fuss.