I've never heard of it either. People who work Monday through Friday get Saturday and Sunday off, and do whatever they want on them, but they are not "strong".

Depending in the intensity of the action. It would be a brush or a nudge if he moved in front of you without jostling you. But, if the action was rude and you were jarred. I would say he shoved his way through.

People will talk with their friends about this. It depends on the person and the closeness of the friendship. It also depends on a person's beliefs, how they are raised, and their individual personality. Not everyone does, and and so don't feel that you have to announce and discuss every intimate detail with your friends if you are not comfortable with it.

When the sex of the person is unclear or not known. It's assumed to be male. So, I would say HIS right hand would be correct. Although, if you said either one of these, one would know what you are asking.

it can be a difficult language. Look, we have lots of words that all mean the same thing, and some words that there is no equivalent to in another language. Also, depending on where you are from, speech patterns, pronouciation, grammar, colloquiosms,  etc. all change. And American English and English-English have differences. New Yorkers talk different than Soouthern people, Easterners talk different than people on the West Coast.  Knowing the words and what order they go in is only part of the equation. Knowing the meaning and all the various meanings and the context in which words are said, is a harder game.