i recently saw a show where people talked about those using botox to get rid of their wrinkles. it works of course but takes out the facial muscles movement in some way so they cant express themselves with their facial expressions.
so they become hard to read what they are trying to say or interpret their agony or pain for instance.
the in turn the people they are speaking with dont return the facial expressions and neither side gets the benefit.
although botox may be great for poker players with tells. :-)