Term describing the phenomenon of when there is a chill vibe between 2 (or more) people who engage in intercourse. HOWEVER there is no friendship involved, just a mutually positive association between sexual partners. Fucking is not the sole aspect of all interactions and some other benefit comes from time spent together (i.e. conversation, life perspectives etc.).
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi