Intersting topic.
I think the desire is linked to maturity and the position you are currently living.
My wife and I are not
ready either and enjoying each others company too much.
Our stance is No Kids ... will it change over time, perhaps but I guess the whys are the most imporant thing.
Why not? For us, we aren't ready nor are we inclined to have them.
So until then.
I work to have my goal met. A GT for her and a Cobra for me.