Why do feminists consider a 'gaze' or 'a glimpse' as a sexual harassment?

Why do feminists consider 'gaze' or 'a glimpse' as a sexual harassment? My body - my choice. That’s my deal how and to which direction I rotate my head and my eyes, that’s MY body, they're just my organs of vision which I use to explore the world. Don’t order me what to do with my own body (till I don’t say or do something to you, e. g. physically getting closer to you, offending you or touching you).
Why do feminists consider a 'gaze' or 'a glimpse' as a sexual harassment?
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