People who feel the urge to barf when witnessing another person throw up are both compassionate and highly evolved, say two medical experts on the stomach-turning topic.

“There’s good news and bad news about why upchucking causes other people in the immediate vicinity to upchuck,” said Amy Morin, who teaches psychology at Kennebec Valley Community College in Fairfield, Maine and works a licensed clinical social worker.

“The good news is, if it happens to you, it means you have empathy,” Morin said.

In human brains, scientists have discovered “mirror neurons” that cause some people to feel the same emotions as others around us. This explains why you might tear up when you see someone in the room cry.