Your going to get different answers to this. Kind of the same thing happened to me acouple of weeks ago. I was out hunting (on the ground)and forgot to bring my jug. Well i had to go so I did. I thought that would be it for the day .About a half hour later 2 doe's and a small buck came within about 20 yards of me. Deer are very curious animals. The only thing about pi$$ing on the ground is that they may spook alot easier. You might want to stay away from that spot for a couple of days or until you get some rain