>>723956218
Best explained by examples.

cucking (in modern definition) is a subgenre of gay porn when a dude (preferably balding manlet skinnyfat who works a desk job) watches how his wife or gf gets fucked by a platoon of bodybuilders, preferrably negroes because it also brings a racist aspect. Then he sucks their dicks and drinks sperm out of his wife's vagina while being verbally or physically humiliated

ntr (IN POPULAR TERMS AND NOT WHAT IS WRITTEN IN JAPANESE DICTIONARIES) is broader, encompassing the previous example, and is based on your expectations of this or that situation. For instance - Ryan Gosling autist 4chan selfinsert man speaks with cashier and she says "haha, you cute". Based on that he imagines 50 years of marriage with her and how they die in the same day. Then he gets his hopes crushed - either he accidentally sees her on a date with someone, or walks on ibto her being fucked by a platoon of bodybuilder negroes or really ugly old dude(s). They don't nesessarily fuck him in the ass and he doesn't nesessatily interact with people having sex - it is more about self hatered, considering yourself a good for nothing subhuman.