Is it normal for me to have had sexual fantasies as a child

I can remember when I was 8 years old how one of my pastimes was daydreaming about naked girls or naked women. I hadn't even had access to porn at the time. I even invented strip teases in my head without ever coming across the words "strip tease" or knowing what sex was. Thinking about naked women just felt a bit good, even as a prepubescent boy.