Why did my crush call me ma’am?

Anonymous
So today I went to my crush’s job and I was standing in line to order from him, there were some older ladies probably in their 50’s in front of me and he was talking to them all polite like “what would you like to order today ma’am, have a nice day ma’am” which I thought was cute. But THENN it was my turn to order so I did (we don’t know each other but we have the whole staring/smiling thing going on right now) but then when I said “thank you” he said “you’re welcome ma’am” He called me ma’am!! Is this something guys say to girls they might like? I know I am NOT much older than him, I’m probably like 3-4 years older than him. I’m in Texas so I don't know if that might be why lol. I don't know tho, I wouldn’t call him Sir... sounds weird to call a male close to your same age Sir. So I don't know why he would call me ma’am
Why did my crush call me ma’am?
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