The fool's speech is inherently argumentative — his lips 'enter into contention,' meaning they initiate strife wherever they go. 'Calleth for strokes' is striking: the fool's words effectively invite physical punishment or severe consequence. Careless, provocative speech has real-world consequences that the fool does not anticipate.
Memory phrase: Foolish words cause fights.
Talk about it: How do careless words start arguments?
Prayer: God, keep my lips from starting arguments.