Abuse of toilet tissue

One of my friends from chennai, boarded his flight to USA to cherish his M.S dreams. Like majority of us, he wasn't well versed with the concept of cleaning with the tissue before.
At Chicago airport, he used the restroom and when he came out an american who followed him inside, called him immediately and reprimanded him to get rid of the used tissues, which he left on the floor. Embarrassed, Our man politely listened to the american and later told him that he never had used toilet tissues before. Once when the guffaw was over, the american asked him "which country he was from". He cooly replied, "PAKISTAN" and whistled away. Great presence of mind :) I would call.