The key word is PROPERLY. This means in love, not in anger, with regret, with the child's best interest at heart, without delay, and appropriate.
Leftists, who have no true love, are incapable of administering proper discipline. Hence, they project their limitations on everyone else.
The Bible in Proverbs is very clear about the importance of such discipline. For example, Proverbs 13:24 (NIV) "Whoever spares the rod hates their children, but the one who loves their children is careful to discipline them." The (NKJV) brings out this nuance "he who loves him disciplines him promptly." The anti-spanking movement is at its root an anti-God, man-knows-best idea.
Concur. A strong willed child requires discipline to get their immediate attention and reinforce the notion of consequences if one violates the law.
The immediacy of a spanking delivers the board of education to the seat of knowledge.