12 until you are married and have your first kid and then 16. Men
Oh that's definitely not just a man thing. My mom treated me like a naughty 10 year old even when I was in college. One of the choirs I sang in in college went to Carnegie Hall, and some people gave my mom checks to give to me to help me pay for the trip. Mom decided to drive down to watch and comandeered the checks for her gas money. I almost didn't get to go. As it was, I didn't have the money for the airfare, so had to drive with mom and my brother. I had rehearsals during the day, but my mom was very controlling about my free time....she didn't like me meeting up with an internet friend, though we had stayed with one of my brother's internet friends on the way over in....Maryland? And my brother and I wanted to go shopping and she wouldn't hear of it, because it was NYC and we might get mugged, and everything is overpriced, and blah blah blah. She treated my brother like an adult....he convinced her that he could pick me up on the last day by himself, she didn't need to come. So we went shopping that day without her even knowing we went, and it was so nice not to have someone telling me how much money I could spend, which stores I could go into, etc.
And my MIL, when I moved here, insisted that I did my Dutch homework downstairs where she could "Correct me if I made a mistake". I was a married, college graduate, and she didn't even go to high school, but she thought I needed her to tell me how to do my homework and how to study. And she would turn burners up behind my back when I was cooking, so everything would burn, she'd change the settings on the washing machine when I was doing laundry....she convinced my husband to get a different paint color than we had agreed on, because her taste was better, even though it was OUR house...I made him take it back and get what we agreed on. But parents just always seem to think we are children, no matter how old we get.