"When we observe a smile, our face too tends to smile (often in an imperceptible and automatic fashion) as we try to make sense of that expression. However, if our facial muscles are paralyzed by Botox, then the process of understanding someone else's emotion expression may turn out to be more difficult, say researchers."
This is an interesting take on Botox - if the face muscles are paralysed by Botox then it is both hard to read other peoples emotions as much as it is for others to read a Botox-paralysed face - what the science fraternity call "proprioceptive feedback" - that is, the non-verbal communication part when we meet others. Of course, there are other non-verbal ways to get the message across.
It is an interesting article and worth a read:
Sissa Medialab. (2016, May 12). Emotions in the age of Botox. ScienceDaily. Retrieved May 13, 2016 from www.sciencedaily.com/releases/2016/05/160512085113.htm