How to Handle Other People's Bad Moods Like a Pro

Here's a question I get asked a lot as a therapist:

How do you sit there and listen to people's problems all day? Don't you get depressed?

To be honest, not really.

You might imagine all that sadness, frustration, anxiety, and shame my clients tell me about would start to rub off on a guy after a while. But, if anything, I feel like I'm a little better at managing both my own emotions and other peoples' because I get to practice all day long as a result of my job as a therapist.