Eh well, have to admit I don't feel comfortable without my glasses (for a lot of reasons); I don't feel particularly "naked" without them (in fact, naked without glasses feels less "naked"), but I wouldn't like someone taking mine off randomly, too (which is probably due to wearing them for more than 25 years, so they're my "eyes" not my "glasses" ^^)
That's a different story, I was talking about the thing about being naked mentioned by the guy. Taking some else's glasses isn't the same, as you said their are our eyes, plus there's the personal space thing. When I was in high school a classmate took my band hair, it was infuriating.
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As a person who switchs from contacts to glasses I don't quite get it but it sure was cute. I want more.