As long as people have been falling in love, social norms have prevented some lovers from being together. The norms vary from society to society, although the incest taboo is almost universal. Forbidden Love applies whenever taboo prevents two individuals from (openly) being in a relationship. This can result in a Secret Relationship , a Suicide Pact , Courtly Love or even Happily Ever After. Compare Star-Crossed Lovers, which is about specific circumstances separating lovers rather than social norms, although there may be overlap. This is a Super Trope, although because it depends on the cultural values presented in the work, no Sub-Trope will be universal. However, the following almost always qualify:
- Brother-Sister Incest/Parental Incest/Twincest
- Your Cheating Heart/Good Adultery, Bad Adultery
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