I got one...

And Indian and a Cowboy walk up to a bridge over looking the river. After several minutes of admiring the beauty of nature, The cowboy says "I reckon I have to piss" So the cowboy whips out his dick and starts pissing. Reluctantly the Indian does the same. Then the cowboy says to the indian "The waters cold" then Indian then replies " It's deep to".

What are they talking about