Age disparity in extreme cases may be seen as dysfunctional (a paraphilia) if such relationships are pursued to the exclusion of all others and to the detriment of the partners.
The term alphamegamia can be used when a person is sexually aroused by partners of a different age group, and "chronophilia" can describe a sexual fixation on members of a different age group.
Like most little girls, my father was my first love.
I adored everything about him, even how he smelled (like pine trees and lemons).
Historically, unequal pairings are quite common, if not the rule.
In Classical Greece, men would typically marry around the age of thirty, and would take wives in their mid-teens, around half their age.
Men in positions of prestige or power have often taken young women as lovers or wives.