1648/1 - Abu Qatādah (may Allah be pleased with him) reported that the Prophet (may Allah’s peace and blessings be upon him) said: “Do not touch your private parts with your right hand while urinating or use your right hand for cleaning your private parts; and do not breathe into the drinking vessel.” [Narrated by Al-Bukhāri and Muslim]
There are numerous authentic Hadīths in this regard.
1) It is prohibited to remove impurity or touch the private parts during urination with the right hand. It is also prohibited to breathe into a vessel while drinking therefrom.
2) It shows the excellence of this Shariah as represented by its ethics and instructions. It encourages everything that maintains one’s physical and moral wellbeing and prohibits anything that causes harm in this respect.
Indeed, the religion has come for the happiness of people and the removal of evil and harm.
It prescribes all that is beneficial and forbids all that is harmful.