massage à trois
n.— «I even braved a “tandem” massage (two therapists) recently at the Aquaterra Spa at the lovely Surf & Sand Resort in Laguna Beach, Calif., though the idea of a massage a trois made me blush. My therapists, a willowy woman and a little fireplug of a guy, had practised until their strokes were identical. It was like being massaged by a single, four-armed creature. Weird and wonderful.» —“Spas can be weird and wonderful” by Sophia Demling Toronto Star (Canada) Oct. 17, 2002. (source: Double-Tongued Dictionary)