I feel this way, and it seems logical. We have kids late, from 30 onward, we had a free life before and we want it again, only we will be about 50-55 when the kids leave the house. Moreover, we want to do cool stuff when the kids get the age at which they become capable of doing cool stuff (hiking for days, mountain-biking through the alps, ...) And yet we are now 36 and we get back pains from sitting all day, the horror! We must do more sports to be able to experience freedom as we did back when we were 28, when circumstances allow us again: when the kids grow up!!

If only we had kids at 23 when we were most fertile. They'd be 16 now and we would have had a lifetime to live in wealth and freedom. (I'm exaggerating of course, kids are great but man, I would have been able to handle those sleepless nights better when I was 23 ;))