I want to sleep naked how do I Ask my parents?

Im 14 and want to sleep naked but I have parents who come in sometimes in the morning. In the holidays i can sleep naked cos i put my washing downstairs so my mum doesn't have to come in to get my washing. But during school, my mum comes in to say goodbye and sometimes if she leaves early, I'm still asleep. So secrecy is not an option.

How do I ask my parents? It's not really an easy conversation.

Also, my sister came in a few days ago. I was awake, she knocked and just came in. It gave me a second to make sure the duvet covered me but I was naked under the duvet. Anybody had anything similar as a side question?
I want to sleep naked how do I Ask my parents?
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