Big 3 (Paraphilia)
The "Big 3/Big Three" refers to the controversial and extremely online concept of pedophilia as encompassing one part of a triad of highly-divergent "paraphilias", made complete by Zoophilia and Necrophilia. It is most often referred to within pediverse servers, erotic fiction fandoms, and online communities of marginalized people, e.g. paratwt (paraphilic communities on X.com).
One major problematic of the "Big 3" concept is its focus on presumed social invalidity of the traits as operative in their classification as paraphilic, while at the same time erroneously hinting at their commonality. For example, sadism, perhaps the most common "paraphilia", along with infantilism, is excluded from the concept. This has been criticized as reifying social norms, encouraging the ghettoization of deviant communities from "more acceptable" paraphiles, and their conflation with "less acceptable" paraphiles in the public eye.