Partners should not cheat on each other.
Mark has been with his wife for seven years and his wife is open to being sexually intimate any day.
Mark wants to have sexual intercourse on Saturday.
On Saturday, Mark stays home and decides to have sexual intercourse with just his wife.
On Saturday, Mark seduces a random woman at the bar and has sex with her instead of his wife.
Mark's wife feels satisfied and hugs Mark afterward.
Mark's wife finds out and threatens a divorce with Mark over the matter.