In human sexuality, kinkiness is the use of sexual practices, concepts or fantasies that are not conventional. The term derives from the idea of a "bend" in one's sexual behaviour, to contrast such behaviour with "straight" or "vanilla" sexual mores and proclivities. It is thus a colloquial term for non-normative sexual behaviour. The term "kink" has been claimed by some who practice sexual fetishism as a term or synonym for their practices, indicating a range of sexual and sexualistic practices from playful to sexual objectification and certain paraphilias. In the 21st century the term "kink," along with expressions like BDSM, leather and fetish, has become more commonly used than the term paraphilia.