"I'm made of --" He stops, looks down, frowns. "I don't know what I'm made of. I think I'm made of person. What is a person made of? Are they made of human?"

There's a massive breakdown in understanding going on here somewhere.

He doesn't know what rutile is, and Rutile looks enough like everyone else to provide no context clues whatsoever -- except that gender isn't involved at all. That's interesting to him, though he can't quite put his finger on why. Maybe just because it's new? He openly studies Rutile, his earlier panic subsumed by curiosity, and lifts a hand before he thinks to stop and ask first. "Can I feel?"

Now that he's looking closer... is it stone? It sure doesn't act like stone. Why would stone need to wear clothes?