Commentary for Avodah Zarah 39:12
ולאסתכולי מי שרי מיתיבי (דברים כג, י) ונשמרת מכל דבר רע שלא יסתכל אדם באשה נאה ואפילו פנויה באשת איש ואפי' מכוערת
But is even looking permitted? They objected: “You shall guard yourself from every evil thing [implies] that one should not look at a beautiful woman, even if she be unmarried, or at a married woman even if she is ugly,
Daf Shevui to Avodah Zarah
This baraita seems to say that one cannot look at anything that might be sexually enticing. This includes any woman and even at animals (and even ugly ones) when they are mating. One should guard oneself constantly against stirring up desire. This would obviously be a very hard rule to observe in the modern age. The angel of death evidently has eyes everywhere. Even if a human had this many eyes and could not help seeing everything, he still should make sure he does not look at anything improper.
Ask RabbiBookmarkShareCopy