DINK life is nice until your social circle is filled with people with kids. You can hang with younger couples, sure, but it wears out fast. The opportunities to hang with people your own age at some regular frequency greatly diminishes (cuz they are tired and have to deal with kids). There is nothing wrong with this - you can splurge on travel and self-development, retire way earlier, or what have you; totally fine and rewarding. It comes down to what you value (I like playing sports and video games with my son more than hanging out with grownups).