House is NOT good at reading people! In fact, several times he made MAJOR mistakes and even almost KILLED people! He sees symptoms and deduces. Even with the little girl and the mother. The girl giggled and seemed normal. The mother was quick to react, and described the right symptoms. He tested the girl to some degree, she giggled and said something to the effect that he was wierd. HECK, I could have figured that was a likely possibility. I might have asked the girl a few pointed questions(Like if she liked being near, and possibly sitting on things that vibrate, or liked moving against something she was sitting on, etc....), but that would give her ideas if I was wrong, and spoil the chance for the mothers confusion.
With the girl that came on to him, he apparently fell for it, etc... until he saw her tears and realized she had an infection. As I recall, that was also the episode the little autistic boy was in. BTW She was REALLY obvious!
He will see a rash, scratches, etc... and DEDUCE what happened. In fact, he tries to avoid believing what the people say/do! Check it out sometime. The WHOLE show is based on his logic and encyclopaedic knowledge. Further, the story line builds with him teaching, seeming arrogant, liking puzzles, and a lack of respect for "authority". The premise is he is doing time for some past misbehaviour. Gee, all that sounds familiar!
Steve