Why is it not OK to call someone sir?

I called someone that +18 older than me. He corrected me as "John." Does it makes a person feel older?
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I actually like being call ma'am. I found that it is very proper and polite. :) Lol, the guy that corrected me isn't exactly a friendly person (his role is a construction superintendent). This is not the first time I get corrected. Oh my.
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+1 y
Woah. I didn't think someone else would think that "submissive sex slave." That is lmao!
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+1 y
lol. I call guy Mister too but it is makes them seem uncomfortable.
Why is it not OK to call someone sir?
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