I have an Irish mother, who did absolutely everything for us as children, so moving out in my mid-20s was a bit of a strain.
Luckily my first flatmate was a clean freak and I picked up some good habits, I also learned I wasn't bad at the old cooking either. My biggest fear was getting myself up for work in the mornings without an Irish woman yelling at me, but it's amazing how disciplined you can become after a few days.
If your first foray into living away from the parents is to move in with a female partner, this can be bad. You will turn her into Mummy and expect her to do all the housework. Even worse, when she does the housework badly, you will compare her to Mummy. It's a freaky, never grow up, incestuous, co-dependency, kettle of rotting fish which can go horribly, horribly wrong.
You never properly reach adulthood until you're made to stand on your own two feet and play 'grown ups'. It sucks but it's also brilliant.
Otherwise, you become one of those bizarre mootants who you see in small town shopping centres - middle aged men following their elderly mothers around - it's too freakish to contemplate.