Can Washing

So I first read about this in a news article some time back.  Then I talked to a guy who worked in a soft-drink warehouse. He said YES, rinse the top of your pop can or beer can if you're going to drink from the can. 

The thing is that all kinds of crap and dirt can land on the top of drink cans that you don't know about; things like rat shit and mouse piss.and who knows what else; things like chemicals and other substances that could be found in warehouses or other places where cans are stored.

So it's just a thing I do and I rarely drink from cans unless I know I can clean the top. I am a bit wierd that way I guess.