Who established this whole 'prime' thing anyway?

I don't believe it when people tell me that I'm in my prime. I'm hearing that a lot lately.
Sure I'm 21...but I don't think I'm in my prime.
I don't feel like I am.
I think your prime is when you are at your absoluete best, when you are exactly where you want to be...
I don't think I'm there yet.
Almost. But not yet.
I have so much to accomplish, really.
Physically I'm not in my prime either. I look forward to the day that I'm a complete woman head to toe and feel totally secure in my own skin.
So to conclude....no....I'm not in my prime.