We've all seen people who've taken so much Botox you can't tell whether they're frozen or just constantly surprised. According to a study by USC and Duke, they can't tell how you feel either. Researchers say that "women who received Botox were less able to read expressions on other people's faces." That's either ironic, or just proof that ignorance is bliss.
This is actually kind of a fascinating metaphor for self-involvement in general: constant worrying about their own looks leads to these people being literally unable to relate to others. Narcissism and lack of empathy, together again. I guess everybody is just going to have to take up sign language.