He's right but not just in terms of being a gentleman when it comes to relationships, etc. Rather, overall, in general, as a grown man, you should have a good vocabulary, be able to form coherent sentences, and articulate them with a sense of integrity as well as intelligence.
Sometimes, how a person speaks can potentially dictate the level of respect they may receive from others, even tho it shouldn't be that way. That old saying about how we should “judge a person by their character and not their cover,” sounds good in theory but, unfortunately, y'know, in this world where people are biased, bigoted, racist, etc, it just doesn't work that way.
Yesterday, I was at this restaurant, a place called TikTok Wings, no it's not based on TikTok, but anyway I'm getting myself some lunch, and a bruh came in for a job interview, and I overheard him responding to the questions, and he sounded soo bad, I felt a little down for him 'cause I knew he wasn't getting that job just based off the fact his voice, cadence, and lack of coherence, no offense to the bruh, but he sounded illiterate.
He wasn't young, as in a teen, but it's hard to tell if he was a little older than me because of how he dressed (no offense to the bruh; he looked a little dusty) and didn't look young, facially speaking, however he could've been, IDK. I'm 30 years old, but I don't look quite 30 because I take care of myself (eat right, don't drink or do drugs, well-groomed, etc), but give or take, he could've been my age or a few years younger or older.
The point is that there are grown men out here who, surprisingly, are struggling to speak clearly (as if it hurts) and form coherent sentences as if their brains are fried like an egg

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