"sexual perversion" refers to behaviors or actions that deviate from what is considered the usual or accepted sexual practices in a society. These behaviors might involve unconventional preferences or fantasies. Full definition
Williams suggests that this retreat into isolation, removing sex from the perceptions of others, may be the best theological definition of sexual perversion: (rachelheldevans.com)
Though he was later accused of every crime and sexual perversion in the galaxy, Hope Hubris began as an innocent. (fkbt.wordpress.com)
Our massacre of a million fetuses a year; our deliberate flight from the monogamous family; our normalizing, of fornication and of homosexuality and other sexual perversion; our programming of self - indulgence above social and familial concerns — all represent a quantum leap in moral deterioration, a leap more awesome than even the supposed qualitative gulf between conventional weapons and nuclear missiles. (religion-online.org)