lecher; nymphomaniac; sexually voracious person
Vulgar term for someone with strong sexual appetites; can be used for any gender but often implies a man chasing women.
dilettante; enthusiast; devotee
Refers to someone who pursues a hobby or interest with passion, sometimes to the point of excess. Can be neutral or slightly negative depending on context.
That man is a notorious lecher, always chasing women.
He's an antique enthusiast, always visiting flea markets on weekends.