May-December Romance/Playing With

Basic Trope: There is a significant age difference between the partners in a romantic couple.
 * Straight: Alice is 25, Bob is 45.
 * Exaggerated: Bob is 18, Alice is 81.
 * See also Mayfly-December Romance.
 * Justified: Bob and Alice live in a culture where men don't marry until they're financially secure, but women marry young to improve their chances of safe childbirth.
 * Bob has a fetish for much older women.
 * A royal Arranged Marriage.
 * Alice is a Gold Digger and Bob is a wealthy man.
 * Alice is actually 43, but through some means, looks a lot younger than she really is.
 * They really do love each other.
 * Inverted: Romantic partners are as close in age as possible.
 * Twincest?
 * Subverted: Alice may look twenty years younger than Bob, but she's Really Seven Hundred Years Old.
 * Double Subverted: Then it turns out Bob is Over Nine Thousand years old.
 * Parodied: The bride hasn't even hit puberty yet, and the groom is Older Than Dirt.
 * Deconstructed: The generational differences between Alice and Bob cause strain in their relationship, and they eventually break up to seek partners closer to their own ages.
 * Reconstructed: But Ted and Carol, despite their age difference, find enough in common that their love can survive misunderstandings, and form a stronger bond because of it.
 * Alternately, the only significant difference is their age. For example, the May is noted to be more emotionally mature than her peers, or the December is a Cool Old Person.
 * Zig Zagged: ???
 * Averted: No one in the story dates outside their own age category.
 * Enforced: "Our male lead, Bob Oldguy, is a box-office hit even in his fifties, but we need a younger actress for the female lead to sell the merchandise. How about Alice Ingenue?"
 * Lampshaded: "Isn't she a bit young for you?"
 * Invoked: Fortyish Bob takes classes at the local college in hopes of scoring with sorority girls by flaunting his superior breadwinning skills.
 * Defied: Bob decides not to go out with the much younger Alice after all; it's more sensible to stick with women of his own maturity level.
 * Discussed: "What you want to do, Alice, is look for an older man. The young ones haven't matured enough to be interesting for more than sex."
 * Or, conversely: "What you want to do, Bob, is look for an older girl. The girls your own age are too immature, and only want to date jocks and bad boys."
 * Conversed: "I hope I can still get the young women when I'm Bob Oldguy's age. Did you see the girl they matched him with in his latest film?"

Back to May-December Romance, you crazy kids and/or senior citizens, you.