What's up with my brother?

This happened a while ago, but I can't get it out of my head.

One day I woke up to my brother lifting my blanket and staring at my butt. (note that I wasn't sleeping with pants on, just a long shirt, but I have my own room, and so does he, he had no business in my bedroom) He dropped the blanket as soon as he realized I was awake and then he apologized. I covered myself with my blanket as much as I could. I never expected him to be in my bedroom, much less be staring at me. This has never happened before, or not that I know of? I don't think this is normal? he is 16 he should know better than to stare at his own sister

What's up with my brother?
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