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It takes years of practice...
But seriously, folks, we are born with most of our sexual urges. The only question is whether or not we get to act on them!
Both parties are awake and of legal age and agree to the act. Mostly married folks engaging in the act would qualify as voluntary.
The possessive form of folks is formed by adding an apostrophe: folks'
Nathan Folks's birth name is Nathaniel Thomas Conrad Folks.
"Plain folks" is a noun phrase. It refers to ordinary or average people in society.