The body is the most versatile weapon on the planet. Strikes are possible from any angle with huge amounts of force. The body can cut, stab, strangle, tear, break, and pound with precision. Utilizing it properly takes the highest degree of skill; punching or kicking incorrectly will break your bones and tear your muscles.
A man who fights using tools will never experience the true thrill of combat. He will never know the feeling of dominating another human being through skill, strength, stamina, and dexterity. He will never know what it means to become a weapon himself.
In the heat of combat, there is no time to think. The body must act of its own accord. No experience on this planet is so thrilling, even sex is boring in comparison. Knowing this, why have you chosen to reject training with the one weapon you will always have on you?