Bull elk, you see, like to douse themselves in urine to attract the females. The urine soaks into their hair and gives them a distinct smell which attracts cows
Regular white tail routinely pee on their back legs so they can scent mark. This is just the alpha/Chad whatever the kids are calling it nowadays move.
It's right there in the image... Did you somehow not comprehend the photo? How could you ask if something is possible when you've literally just seen it.
I read an article recently about how Yellowstone rangers are pretty good at dealing with traffic jams like this, because they happen so often in areas where there are bears