Teenagers Already?

I sent the kids upstairs to get their pajamas on for bed. Brandon's fine, but despite her recent streak of independence, Caitlin still can't get her nighttime diaper on by herself. A few minutes later, I went upstairs to help Caitlin. I was met by two closed doors and two kids demanding "privacy". Excuse me? Last time I looked, I had a 5 1/2 year old and a 3 year old. Not two teenagers!