Why would a guy acquaintance introduce me to his mom?

There’s no indication that he likes me in any way romantic, just acquaintances who see each other around and talk sometimes. But I was walking and on my way to get coffee and he was with his mom. I was out of their sight until he called my name and said “I want you to meet my mom!” We’re not that close but anyway I didn’t have a problem with it. But I was just confused because isn’t that only for girlfriends or friends who are very close?

Why would a guy acquaintance introduce me to his mom?
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