>And are these classes mutually exclusive? No, can't be, I can work my own shit.
Self Employment is clearly in the working class category to the point you employ another laborer to Labor for you
>Are anyone only part of one class?
If you work solely for a wage and dont profiteer off anyone else's Labor you are simply working class
while the opposite rings for a member of the Capitalist class
>Yes, a slave or a criminal could be, but that's not accepted within a laissez-faire society, and is a necessary component of communism.
Lost in Translation
>Is the relationship between these classes inherently exploitative? No,
the Capitalist class profits off of the Labor of a Working class
>voluntary exchange (in this case labour vs currency) is great.
Voluntary exchange is largely a myth
With the exception of the occasional Luxury commodity the Vast majority of purchases people make they make because it's Basically Mandatory to purchase these things to live in Society (Car / Home / Phone / Internet connection / food etc)