"Bubble Butts Vol. 4" sizzles with its first scene, as two unidentified beauties with generous backsides strut their stuff. In a dimly lit room, they tease each other, their rounded globes jiggling with each provocative move. One girl, her skin glistening with baby oil, arches her back, pushing her ass towards her partner. The other, with a mischievous grin, grabs a handful, squeezing and spreading, revealing her wet, eager pussy. The camera pans out, hinting at more to come in this tantalizing volume.