Common Psychological Rules of Etiquette. Learning new thing is very important. It can be useful for for many reasons because of hygiene reason some houses have strict rules about when entering a home, take your shoes off.
Do not burp loud an in public it’s rude.
Use often please and thank You. Always use some words like,”pardon?” or “come again?” with “huh?” or “HAH?”

Some other ones sit straight at a table this is for health as well as good dinner etiquette.
Never eat with your mouth open.
When you shake someone’s hand upon greeting, use a firm grip and look them in the eyes to show that they have your full attention, also by firm grip I don’t mean squeezing.

No arms on the table. Chewing gum would be bad too.
Never, under no circumstance, argue aloud in public, no matter what the other person said to you, no matter how rude he or she is.

Make sure the toilette is clean after using it.
These are just common sense or courtesy. The idea for every young man and woman to learn etiquette and manners so they can be treated with respect and be respectful themselves. Regardless of the gender of the person.