Sex & the Single Woman: Move On?

I would like to keep my inner child alive for as long as possible and I hope that my significant other feels the same way. However, is there a limit to how young we should be?

Specifically, I am thinking about the age when a guy needs to pick up his life and move out of his parents’ house. At what age is this absolutely necessary?

This question has been approached in various movies and TV shows, including Failure to Launch and Sex and the City. Nevertheless, I still can’t seem to find an answer.

What do you think–at what age do men need to have their own place?