He likes to talk about medical stuff even if you are not listening.
He is always very calculating.
He want to inject you a needle with an strange liquid, so he always ask you if he can, If you don't want he will respect your decision and don't do that.
He likes to observe what you do.
He likes to sit in weird positions.
He has a weird obssesion for nails, so he always take pictures of your nails.
He is very calm, never agressive.
He is stutterer.