I'm 58, and the youngest SP I've seen this year was 28 years old. She was great, mature beyond her years and I should go and see her again.
I like woman in their mid-to-late 20's and early 30's. I'm not interested in seeing SPs in their 40's as at that age getting close to the age of woman I can date. My biggest age gap for dating was a woman 11 years my junior. Also, I go out weekly (4 times last week) with a pretty 32 year old, but we are "just friends". I'm smitten with her and would stop seeing SPs all together if I could figure out how to turn that 32 year old into my girlfriend. She complains a lot, and I mean a lot, that she just can't meet a man so I just go out with her and then go see a SP in her age range to have the sex we aren't having.