How to attract older people?

I'm 20 and strongly attracted towards older guys with big age gap (at least 10 years). But even though I'm legal enough, they seemed to build barrier around them. It feels like they treat me like a kid (even though it might be true lol). What should I do to appear attractive to them? Or maybe younger girls are just not their preferences?

I'm bi, so this case also applied to older ladies.

How to attract older people?
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