What's the real reason women treat a man differently, coldly even?

My suspicion sometimes if, women my age or 20s in the past even ever seemed like they treated me or served me coldly or oddly than others (yes, I'd see that slight eye roll turn of the head even when they thought I wouldn't) it just go me thinking looking back at memories as I near 31 - why would these women treat me differently? Surely, surely they're not suppressing feelings of - attraction? Lol 🧲 😆 I just would notice things like they'd be tense during and after interacting with me, and sometimes I'd wonder, either I'm really that ugly, really that annoying or off-putting or someone's a really good poker face - goes for a handful of women in my lifetime this far. Lol 😆

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I always like hearing insights lol 😆 surely I can't be that ugly however I'm often taken aback that anyone would find me attractive to be cold, let alone to be cold just to be a cold person. I mean I consider myself upbeat and not death stare like like some are in this world 🌎🌍
What's the real reason women treat a man differently, coldly even?
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