I agree .. I remember once years ago when I was working and shaking hands with a client ... he gave me the creeps
I guess I was right, because he went to jail for embezzlement
I think if you were buying or selling from a person you could feel how committed they are or a hint of being insincere.
I also think if there is no reason to be nervous or over heated you could since this person has a medical problem.
I believe that it all a part of reading body language.
Have a good night off to dream land!:)