Like the majority of the comments above, I too prefer the mature ladies.
30 to 50 is a really really sweet spot !
I have ventured out of that range but by low single digits for sure. Exceptions are rare.
Most ladies have what's called " regulars ". I have the similar practice of seeing mostly the same ladies over & over and for the reasons noted by others.
It makes for a more enduring relationship and both parties get more out of the relationship. It's kinda cool to see the looks on their faces when you do something a little extra for them and vice versa.