You're assuming unfortunately.
It's not a matter, IMO, of people "wanting" to admit they're not young
You asked an opinion and you're sort of telling people their opinion is wrong.
You consider me old at 32, I don't.
It's not a case of not wanting to admit I'm old though.
I am VERY different from you. At 21 I was dating 30 yr olds. . . I didn't find them "old".
30, 32, 35, 38, etc. . . has never seemed old to me personally.
100? yes, to me that's old!
My family lives to be very old though. I knew my great-great grandmother and my great grandmother for a long time so 'middle aged' to me isn't until I'm about 45. So 32 is young!