ונשמרתם מכל דבר רע
שלא יסתכל אדם באישה נאה ואפילו פנויה, באשת איש אפילו מכוערת
עבודה זרה כ
Why is a lady being referred to as bad? Because only if a person contemplates how bad it is for him to look on a lady, and how much destruction he brings about with one look to himself, his family, klal yisroel, and the whole world, only than could he muster up the strength not to follow his eyes.