I am late 60s and it is years since I last fancied a woman of my own age. I favour SPs who are mid twenties to late thirties, meaning they are likely to be youthful and experienced but not jaded, flabby and burnt out.
That said, one I saw a couple of years ago was 45 years younger than me and my favourite semi - regular admits to having turned 50 although she is FAF with a body which many 30 somethings would be jealous of.