Kink is a term used to refer to a broad range of sexual practices (sometimes referred to as kinky), including spanking, bondage, dominance and submission, sadomasochism (BDSM) and sexual fetishism. Kink sexual practices transgress what are considered "normal" sexual boundaries as a means of heightening the intimacy between sexual partners. Some draw a distinction between "kink" and "fetishism", defining the former as enhancing partner intimacy, and the latter as replacing it. Because of its relation to "normal" sexual boundaries, which themselves vary by time and place, the definition of what is and is not kink varies widely as well. Practitioners are sometimes considered to be perverts by "outsiders."