Rachael really liked the effects of dark chocolate breasts, but the chocolate itself was tasting bitter in her mouth.
"Hmmm, I could use some milk to wash it down. HEY! I've got an idea!"
Rachael went to the refrigerator to grab a jug of milk, and she also grabbed an empty syringe from one of the kitchen drawers. (Rachael's mom is a veteranarian, so they usually have some spare syringes for administring medicine and such.)
Rachael took a new, unused syringe (without a needle), and she filled it with milk. She took a dark chocolate breast and injected milk into the center.
"This will make it taste better."
Rachael ate the chocolate, and it did indeed taste better, but then something odd started happening to her. She felt her pulse beating through her breasts. She removed her shirt and noticed that blood vessels in her breasts were bulging and throbbing, as her glands suddenly kicked into production. With each beat of her pulse, she felt her breasts being filled--no, pumped-- full of milk. It felt warm and calming, yet it made her feel tired and hungry.
"Strange. It doesn't hurt, but it feels... weird! I think I'd better get something to eat and drink."
Rachael made herself a sandwhich, and all the while her breasts slowly filled with milk. The sensation was like gulping warm milk down her throat, except it was going to her chest instead of her stomach. Droplets of rich milk leaked slowly from her nipples as her body experienced a satisfying "all full" sensation. Then, the throbbing stopped.
Rachael took her breasts into her hands and felt them. They weren't much larger than before, but now they were much heavier. A warm, tingling sensation came from them. Though she felt no pain, she was overcome with a desire to release the milk, but how?
Rachael considered the options. She could try milking herself. (Maybe the milk could have magical properties and could be used for other things.) Also, there were some newborn kittens down in the basement. (Someone abandoned them, and Rachael's mom is going to bring the kittens to the shelter on Monday.) Perhaps the kittens could use some milk.