A term used for bathing partners that engage in hygiene routines with each other, but do not share the usual emotional attachment of a standard boyfriend/girlfriend relationship (can be applied to heterosexuals or homosexuals.) The purpose of shower sharing is for a more lively cleansing activity in order to improve the mundane tedious chore or cleaning oneself.
Ryan: “Showering is so boring”
Richard: “Wanna be shower buddies?”
Ryan: “Yeah! Let’s clean each other!”