When my sister was 53, she kept getting chatted up by men thinking she was 32 at the most. I was 53 when I met and didn't recognise an old class male friend and he said I hadn't changed a bit. Also a man who had been in my sister's class year, 3 years younger, recognised me but I didn't as not met him, but we did live in the same street.
The delivery man looked in his early 20s but told me he was 50. His dad had died recently aged 96 and looked in his 50s.
It's all in the genes or for some plastic surgery.!