Why do I feel attracted to older woman?

Why younger men are attracted to older women includes their experience, confidence, assertiveness, and maturity. A few years younger than a woman will likely find her life experience to be intriguing; he wants to learn about her and her life experience.

What do you call the much younger and beautiful wife of an older wealthy man?

An attractive younger woman pursued by a wealthy man who is perceived as wanting her only for her appearance may be called a trophy wife.