According to Urban Dictionary:
Age 18-21: Wildcat
Age 22-29: Lynx
Age 30-39:
Puma
Age 40-49: Cougar
Age 50-59: Jaguar
Age 60-68: Panther
Age
69: Pussycat
Age 70-79: Cheetah
Age 80-89: Leopard
Age 90-99: Tiger
Age
100+: Lion
So, there is your feline scale!
Personally, I’d rather date a younger man because men my age feel that they need to educate me. Sorr, but I already know how to drive, cook and otherwise look after myself. Please don’t tell me how to do stuff unless I ask your advice. I would probably go no younger than 15 years. Makes him mature but not super into “traditional” roles.
Then again, I’m not interested in dating at all, so ‘tis all moot.