A newborn begins to cry, inducing her neonatal neighbors to join in an ensemble of high pitch cries. A few years later, that child runs to hug her classmate in pain. As a teenager, she enjoys hanging out with her friends. Sometimes she laughs with them, even though she is not sure what they are laughing about. A few years later, this teen is a professional designer interviewing a user for the first time. Her colleagues say she is good at building an “emotional connection” with her clients. She cannot tell for sure why, but she feels she connects with the emotions of others and can sometimes experience on her flesh the sensations and feelings described by someone else.