Why don't men want to date someone of there own age or close to it?

Like I'm 31 and found a guy who was 29 but he wasn't happy with my age, he rather date someone who is much younger or older... so like do men find it boring to be with a woman of there own age despite being in there 30's, 40's, or 50's?

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I'm a female who wants to be married but have a child free life
Why don't men want to date someone of there own age or close to it?
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