*Thought they were lying.
Or had left it too late to choose anymore*
This is just SO typical!
Nobody can genuinely choose to be childfree - no, they're either in denial or 'left it too late'.
Heard it SO many times. Why are some parents so convinced their lifestyle is so desirable that anyone who doesn't want it is fibbing? Believe me (though you won't) I see my friends with kids and have absolutely no desire whatsoever for that life. It looks awful to me. They may think the same about my life, but I'm not going around saying anyone who has kids is secretly regretting it. I accept that different people want different things in life. Unlike some.
Tbf I think it is quite unusual
See above. You believe what you want to believe.
Men can easily change their mind and have a baby with someone younger
Well, no unless they are millionaire actors, most men can't 'easily' turn around and have a baby with a much younger woman, because your average man in his 50s really isn't a catch for most fertile young women, despite what they may like to think.
females simply do not have the option once their fertile years are over
Why do you keep banging on about this? We KNOW! There's not a woman out there who isn't fully aware that after 40 or so, her chances of getting pregnant are slim. We KNOW! And some of us just don't want it. Honestly.