It’s no secret that Fernet in all its forms remains an eclectic bartender favourite. The bitter in all its forms adds depth and character to any drink it is added to, one could also probably argue it adds depth and character to anyone accustomed enough to drink it straight.
It is a beverage that requires an understanding not shared by all. I think the ad from the Glue Society that is on this link does a good job of capturing that essence.
Cheers to Mikey C for the share.