Mark reached into the box of chocolates and grabbes a few. They turned out to be a white butt chocolate, a brown nipple chocolate, and a brown breast chocolate.
Mark warmed the breast chocolate up with his fingers, and pressed it against the white butt chocolate. He then took the brown nipple chocolate and pressed it up against the breast chocolates. The final product was a mes of white and dark chocolate. Feeling satisfied, Mark popped it into his mouth and felt his bottom shrink a little, then to grow again as pure extacy erupted from his butt. Walking over to a mirror, he saw that there were two large nipples, one for each side of his butt, standing at full attention. The nipples on his front were too, but he was mesmerized by the boobs on his butt.
Meanwhile, Rachel was experimenting on her own. She took a two dark chocolate breasts, and attached one under the other. She looked on in amazement as a second set of breasts formed below the almost-giant pair on her chest. This time she pulled out six chocolates from the box: four dark and two white breasts. She attached two dark chocolates underneath a white one and ate it. The two breasts she could see decreased in size, barely allowing her to see a third pair of breasts forming on her chest. She made the same type of chocolate, ate it, and watched in awe as the six breasts changed size again, her lagest and topmost pair shrank, while the bottom two expanded to create a tier of breasts all the same size. Rachel walked over to the mirror where Mark was examaning himself. Rachel smirked when she saw Mark's ass-boobs and said, "I'm sure they could get bigger," as Mark gawked at her racks. Rachel walked over to the box and picked out several chocolates, all dark: a breast, a nipple, and a butt. She stuck one of each together and fed it to Mark, and watched as his as ass-boobs grew, the nipples growing to a huge 2 inches long, the breasts growing to a large D cup.