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Amongst zoophiles and some researchers, the term bestialist has acquired a negative connotation implying a lower concern for animal welfare. This usage originated with the desire by some zoophiles to have a way to distinguish zoophilia as a fully relational outlook, from simple "ownership with sex." Others describe themselves as zoophiles and bestialists in accordance with the dictionary definitions of the words.

Finally, zoosadism refers to the torture or pain of animals for sexual pleasure, and also includes willfully abusive zoosexual activity.