Surely sociopaths have to fake/mimic empathy/sensitivity to pass among there fellow humans? How do you pass for normal? What tricks do u employ?
Act like the person you are interacting with is your new best friend. Always have a few interesting stories handy, and a joke or two helps. Hang on their every word like it's the most fucking amazing thing you've ever heard. If they say something they think is funny chuckle anyway. Always be in a hurry so you never are in a situation where you have nothing more to say. If you're at a check out, make sure you have your credit card and car keys out before it's your turn, you want to move as quickly and efficiently as possible and appear to be in a rush.
I change the tone of my voice and facial expressions to match whatever emotion I'm faking. I also use certain body movements, depending on the situation and the person I'm interacting with. I try to keep them subtle though, not dramatic, otherwise people know I'm faking it.
It also helps to study the other person, so you can mirror them to some degree, but not too much.
a basic understanding of acting can do it, but for deeper understanding:
I read alot of psychology books/journals/reports/etc, there are methods created by paul ekman the read and mimic facial expressions of emotion, created after extensive studies on how emotions subconsiously affect facial movements, beyond that studying body language in general is a critical aspect of reading and mimicking proper social behavior, as non-verbal comminication accounts for over 75% of what we convey to one another.
Understanding empathy is pretty simple, it is nothing more than the ability to pretend we are in the same circumstances as the person we are attempting to empathise with