Two bouncy and desirable podules attached to a female's chest area. Big daark nipples which stick out make them even better. Just lick the nipple area and then squeeze with both hands and bounce up and down and you're sure to get a boner.
What I desire a lot of the time, though I rather prefer booty more often. These are the big or small squishy attractive things on a girl's/woman's chest.
Also see fun bags, jugs, boobs, tits, and knockers.