I found this article very interesting.... it explains why at the beginning of learning salsa, its difficult to multi task your motor skills. This is also scientific proof of why learning to follow is much easier than learning to lead... Learning to follow requires the use of the sense of touch (which according to the published research - the brain can easily handle because it is directly connected to the motor processing part of the brain). However leading requires the images of the actions (planning and forming motor actions) be kept in the leads head followed my multiple motor skill actions - which the brain cannot easily do at the same time. (it has to keep track of how the leads feet are placed, timing of music, planning the next move, how the move should look, the follows feet, the hands to lead the move...etc). It says that the reason we are able to do this is because by forcing our brain to perform all these activities repeatedly, it ends up turning all these different tasks into just one. So as an example, crossbody lead - instead of thinking, ok, step forward, step side, open up, lead the lady across, and come back together on 7 and basic step... we just think - cross-body lead (so we don't have to "plan" for a cross-body lead just let our muscles execute it) and our brain is then free to do 'other' things such as adding styling and flavor.