This occurs during a perfectly drunken night of intercourse between two (or more) nymphomaniacs. All parties are in a drunken haze or dream like state. There proceeds to be a constant battle or power struggle (fun and non-violent) of who maintains dominance on top, resulting in continuous position changes from being on top, to being on bottom until one of the parties submits. These twisting, toppling, turning and tangling motions resemble that of an actual blender.
Party 1: “How do you feel this morning after how amazing last night was?”
Party 2: “Oh I definitely feel great. But I am kind of drained and exhausted. It was a god damn drunken sex blender lol.”