'''Basic Trope''': A romance between members of different species.
* '''Straight''': Bob, a human, falls in love with Alice, a {{werewolf}}. [[note]]Okay, technically a "wifwolf" for all you language nerds out there.[[/note]]
* '''Exaggerated''':
** [[BestialityIsDepraved Bob falls in love with a dog.]]
** Bob finds his own species unattractive, so he practically always falls in love with creatures who aren't apart of his species.
** In a work with LoadsAndLoadsOfRaces, Bob is in a [[{{Polyamory}} polygamous relationship]] with at least one member of each species.
* '''Downplayed''': Nancy, who [[HalfHumanHybrid is half goat demon]], [[LittleBitBeastly looks and acts almost completely human]]. She appears and behaves so much like a normal human that, Bob, her fully human boyfriend, did not believe that she was part goat demon for years after they started dating.
* '''Justified''':
** Alice never revealed to Bob she's a werewolf, and Bob has no reason to suspect Alice isn't human.
** Bob has a thing for werewolves.
** Bob loves Alice no matter what she is.
* '''Inverted''': Bob falls in love with another human who is the same race, and as close to him in appearance as possible.
* '''Subverted''': Alice is thought to be a werewolf due to a humiliating incident and fish being her TrademarkFavoriteFood, but she turns out not to be one after all
* '''Double Subverted''': In fact, it turns out that ''Bob'' was the werewolf, and mistook her for a member of his own species.
* '''Parodied:''' Bob has been known to romance some pretty strange things, in fact he was once seen with a female sea turtle singing "Younger Than Springtime" before being arrested for harassing wildlife.
* '''Zig Zagged''': Though the audience suspects either Alice or Bob is a werewolf, the audience never finds out who, if anyone, is a werewolf.
* '''Averted:''' Bob is not seen in love with anything but his own species.
* '''Enforced''': Due to a {{Gendercide}} or DepopulationBomb, one species must mate with another to avoid dying out.
* '''Lampshaded''': "Um... Bob... most people try to only romance people of their own species, you know."
* '''Invoked''': The females of one species are designed to be sexually attractive to the males of another species (or multiple other species), either for reproduction or to serve as a hunting lure.
* '''Exploited''': Knowing his love for werewolves, Emperor Evulz sets up Bob with Alice to both distract him and have Alice relay information regarding Bob.
* '''Defied''': "Yuck, I don't wanna date a ''werewolf''!"
* '''Discussed''':
** The happy couple take the time to work out cultural differences, overcoming biochemical barriers, and managing mechanical differences between Tab A and Slot B.
** An interested third party who has researched both species offers some helpful advice on managing cultural differences, and warns of any activities that would normally be safe if Bob was dating a human, but could be potentially dangerous or painful under the circumstances.
* '''Conversed''': "Why do humans and non-humans keep falling in love in these books? You'd think the [[ImAHumanitarian dietary concerns]] would be enough to keep them from having anything meaningful."
* '''Deconstructed''': The differences between Bob and Alice's species threaten to tear them apart, literally. Bob stumbles upon Alice, who has transformed fully and isn't in control of herself, and is attacked by her.
* '''Reconstructed''': Bob, after dating enough dangerous creatures, expected this to happen at least once, and came prepared. After the incident, Bob still loves Alice.
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%% Optional items, added after Conversed, at your discretion:
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%%* '''Implied''': ???
%%* '''Plotted A Good Waste''': ???
%%* '''Played For Laughs''': ???
%%* '''Played For Drama''': ???