The Prophet (blessings and peace of Allah be upon him) was the best teacher and educator. He taught his ummah everything that is beneficial for them, which includes his teaching them the etiquette of eating and drinking, and of relieving oneself, as in this hadith, in which the Prophet (blessings and peace of Allah be upon him) forbade breathing into the vessel when drinking. If the individual wants to breathe whilst drinking, he should breathe outside the vessel, whilst holding it in his hand, lest that be off-putting to others who will then refuse to drink from the same vessel, and so that the smell of the vessel will not be changed by too many people breathing into it. That was also for the sake of cleanliness and the well-being of all, and to protect against contagion and so on. This is general in meaning and applies to all kinds of drinks, water and others. The Prophet (blessings and peace of Allah be upon him) also forbade wiping oneself with the right hand, which refers to cleaning oneself after relieving oneself. And he forbade touching the private part with the right hand. So the individual should not touch his penis with his right hand after urinating. That is because the right hand is to be used for good things, and should not be used to remove filth and dirt. Everything else should be done with the left hand. This hadith highlights how Islam was the first to highlight proper etiquette when eating and drinking, and to promote personal and public hygiene, for the well-being and safety of all..