A thumb with the nail joint supple (bending backwards or as it is also called "double jointed") indicates a character the exact opposite of that associated with the "tied in" thumb. Possessors of such a thumb are generous, adaptable to others, extravagant, and impetuous in their actions and decisions. They promise things quickly and are more often heard to say "Yes" than "No"; but if they have time for reflection, they very often go back on their promises.
Individuals having a "stiff-jointed" thumb, on the contrary, cannot easily adapt themselves to others. They are distant and more reserved with strangers. When asked to do a thing, they generally first say "No," but on reflection or when reasoned with, they often give in to the other and generally regret having done so. It is useless to oppose such people—if one cannot lead them, it is no use attempting to force them against their will.
This type has more self-control than the type of people with the "supple jointed" formation, and is not so generous or extravagant. Individuals of this group, however, make more reliable friends, so their friendship, though difficult to obtain, is generally worth having.
A thumb standing very far out from the hand (almost at right angles to the palm) is not a good sign for ordinary success. Such people go to extremes in everything they do and are generally fanatics in religion, social reform, or whatever line of thought occupies their attention.
HANDS, HARD AND SOFT
Even in the simple act of shaking hands, one can form conclusions about character.
Beware of any man or woman whose hand seems to slip from yours when you grasp theirs in greeting. Such persons are deceptive and treacherous. They may smile at you with their lips, but instinctively they regard you as their prey and will only use you for their own object.
A soft, fat hand is the indication of an indolent and more or less lazy person.
A firm hand is the sign of an energetic, reliable nature.
A very thin hand denotes a restless energetic disposition, but one that is given to worry, and fretting and is generally discontented.