This is what happened with me and my eleven-year-old sister. One night she was sleeping with me on my double bed and said she had some questions.
"Go ahead." I told her. "Can I see your body?" my sister said. After a little moment I said yes, so she asked me if I could see "down there." I took off my pyjama bottoms and felt her hand feeling "down there."
She asked me if it tickled and I said no. She then asked if I wanted to see hers, so to make it fair I said yes. As she took off her pants, I felt really horny. My sister's thing had no pubic hair and it was so smooth! She let me touch it! Afterwards she fell asleep and I had a hell of a time masturbating next to her!