Girls, is it weird that I'm jealous about the way my brother is retaining his looks as he ages?

He's 4 years younger than me but when people see us together they assume that we're mother and son >:( I always feel wrapped with jealousy when we're together.

I mean if you see a girl who looks way younger than she is at least I can brush it off by telling myself "she's probably just really talented with makeup". Can't fall back on that consolation with a guy.
Girls, is it weird that I'm jealous about the way my brother is retaining his looks as he ages?
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