One social theorist has described the attraction of this form of sexual encounter thus: "The ultimate sexual objectification of gay male sexual encounters is the glory hole in public toilets. As a wall separates the two participants, they have no contact except for a mouth, a penis, and perhaps a hand. Almost total anonymity is maintained as no other attributes are taken into consideration."[3] The glory hole is seen as an erotic oasis in gay subcultures around the world; people's motivations, experiences and attributions of value in its use are varied.[4][5] Portable glory holes are also sometimes used.[6]