How much older or younger would someone have to be for you to feel uncomfortable being seen in public with them?

There's a gap where it starts to get awkward. How much do you think it is? I'd say 10 years older and younger at this point, although ideally +/- 5 or 6 I think is a reasonable range.

How much older or younger would someone have to be for you to feel uncomfortable being seen in public with them?
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