Contrary to what others have replied there are much more stressful situations than being a father/husband and they're such that you may never want to be one!

> I don't want to find an out if a strong enough stressor turns me into and adult or not.

Stress doesn't necessarily mean you have to grow up in the sense that you stop having fun. It just means you notice subtleties, know better, and are otherwise prepared for whatever life throws your way. In many ways this just makes life more fun.