Oh wow! I just took it for granted it was a kid, not an adult who sounds like a kid.

It reminds me of that story of the grown man impersonating a child and going to school in California. When he got caught they found out that his "fathers" were having sex with him under the assumption he was a child. They literally began freaking out when they found out they had been having sex with a grown man instead of the pre-teen runaway they had taken in.