For Men Looking at Women (Non-Mahram)
Accidental Glance: The first, unintentional glance is forgiven, but one must immediately lower their gaze and look away.
Intentional Looking: Deliberately looking, checking someone out, or continuing to look after the first glance is forbidden (haram).
What to Avoid: Looking at the beauty of non-mahram women, their hair, or any part of their body with lust or intention of pleasure.
Permitted (with conditions): Looking at the face and hands (up to the wrist) without lust or fear of sin is generally allowed for non-mahram women.
我看这么多书,难道不知道如何看异性?