I’d say it’s a tie between two things.
I had wondered if dog piss would give me the same rush as dog cum on my face and in my mouth. So, I took my boy out for a walk one day and actually leashed him so I could lead him further back into the woods before he could stop to pee. Led him over to a bit of tall grass and I got in real close as he was sniffing. The second he lifted his leg I got it down and put my face under him. Managed to get a bunch on my face and in my mouth but also a bunch in my freaking eyes. Was not a huge fan of any of it.
The other thing was, I’d often see my dogs asshole twitching when I was sucking his dick behind him. So of course, horny brain and curiosity, I gave his asshole a lick. I didn’t mind the bitterness really and he was pretty clean. He wasn’t a fan though and he stepped forward so I stopped. I tried rimming/tossing a few other times that he was receptive and even would step back into me for.
Yeah I know. I’m disgusting. But hey, we all do some crazy things when horny. ?