Come on people are making it as if the guy who looks is always responsible. According to this logic what’s the Halachas regarding znius everyone should dress how they prefer and the men just shouldn’t look. There is a big Yetzer Haro so the Torah says don’t dress as not to attract any unnecessary attention. The him and her will both be held accountable which one more is no difference. The argument “don’t look” isn’t at all relevant here..
Also everyone looks the first glance as people’s eyes see everything. So even if he looks away after that first second (against his Y”H) she will be held accountable for that first glance.
JBL