I will admit that I have never tasted horse piss. Nor would I use it in a comparison with the taste of beer, as I respect horses too much.

My comparison would be bilge water, with the UK variation of this vile concoction left out of cooling a bit longer to give it an extra gamey taste. I understand that if you drink enough of it, your taste buds are compromised-encouraging you to actually promote the taste as not being disgusting.