shabbat 64

the gaze

the sin done with the eyes
and
the appearance of sin in someone else's eyes

(the list of jewellery confiscated in battle and needing purification includes items worn privately - early version of vajazzling? -  with those on public display. prompting R. Sheshet to rule that looking a woman's little finger, public, is equivalent to looking at her genitals - see Brachot 24. Later in the page, there is a discussion that an action that appears to be like a prohibited action is also prohibited. even if one is in private. for english translation of the full talmud page, see here)