three.two some
A menage a trois of two girls plus one guy, where one girl is only lesbian, one girl is bisexual and the guy is straight; so one girl sexually enjoys a girl n a guy; guy n lesbian do no have sex but enjoy sex with the other girl; also a pun on 3.2% beer, i.e., not a full feldged threesome, but the reduced variety
Man. They had a three.two some; Ally, Betty n Mark. Ally came off best because she enjoyed Betty n Mark. Mark is straight n Betty is lesbian. Ally is bi.