@yisrael-wix
Move with the times, Guinness isn’t just the black stuff anymore, although it is if you stick with the one and only original. 
https://www.guinness.com/en-gb/our-beers/
I thought the same as you did too with adding it too, however Brother-in-law was adding it to my drinks on my wedding day/night, so I got used to the taste of it. Plus, I wasn’t paying for the drinks so a win, win for me, two drinks in one and all for free 