Stretched out my hands ( spreading fingers further apart). felt that my right hand , esp between the thumb & index , was tighter than left hand. idea?

Nobody is perfectly: symmetrical. To find minor differences in anatomy or physiology (body function) between one side and the other should, really, be expected. Often there is an explanation: for example, perhaps you use the hand which is more flexible more often so it naturally gets more stretching. Don't over-concentrate on checking out your body if it's working fine...it can make you "crazy." Stay well:)