So, lets take that case and apply it in America:
When a guy goes to a public restroom stall and opens the stall door without washing his hands, the bacteria go on the handle. Then when the next guy uses the handle, he gets them too.
Really, you need to wash your hands after you shit. Not before. The right hand that uses the lota almost never gets dirty unless absolutely necessary in the course of work. It is the left hand that gets dirty, and that does not handle the lota at all.
But continue posting "That's disgusting" and"That's gross" in every post, I enjoy thinking everything out for you and repeating the previous contents of the thread so that you don't have to read it.
And finally IT DOES matter if you have or have not used a lota. Because then you would already understand everything and not ask these questions.