What is a younger man who dates an older woman called?

A manther is the male version of a cougar, or a middle-aged woman who has the hots for younger men. Manthers are older men who pursue partners significantly younger than them.

Whats the difference between puma and cougar?

Mountain lion, puma, cougar, panther—this cat is known by more names than just about any other mammal! But no matter what you call it, its still the same cat, Puma concolor, the largest of the small cats. All of these names are considered correct, but scientists usually use the name puma.