Wanted to get everyone's opinion on what you define as the age of a mature provider and for the gents only - what is the age of of the oldest provider you have seen?

For me, I define a mature provider as someone over the age of 40 and I seen a bunch of traveling mature providers (Summer, Cali, Janelle) and the oldest mature provider I have seen is probably Jessie from Florida who was about 60 when I saw her about 3 yrs ago.

to me mature is over 40 and the oldest I've seen was 53