If you like your coffee black you may be a psychopath. Having a preference for bitter tastes is linked to being a psycho, narcissist, or sadist.
A predilection for tonic water or coffee could indicate some psychopathic tendencies in a person’s personality according to “Appetite Journal.” In contrast, people who dislike bitter tastes tend to be more agreeable, the researchers discovered.
Sorry Jen, my wife, you are a psychopath. Don’t kill the messenger.
Appetite, a research journal