I could not understand this statement "It is NOT permissible for a man who believes in Allaah and His Messenger to put his hand in the hand of a women who is not permissible for him or who is not one of his mahrams. Whoever does that has wronged himself (i.e., sinned)"...a mahram, as per WIKI (http://en.wikipedia.org/wiki/Mahram) is "Anyone who a Muslim is not allowed to marry is mahram, if they are of the opposite sex and have reached puberty".