Rob figured the whole thing was a joke, so he grabbed a dark chocolate boob chocolate and ate it. Immediately, he felt a tingling in his chest, as his manly pectoral muscles swelled a little bit and became less like toned muscles, and more like fleshy breasts. The effect wasn't that noticeable from the outside, but he could feel the difference.
"No way...," he exclaimed, not believing his eyes. Glancing at the box, the chocolate he had just eaten was still there! Apparently, however these things worked, there was a seemingly infinite supply. This allowed for some interesting possibilities. He could make himself a muscled Adonis, a true man's man. Or, he could make himself into a woman, to see things from the other side of the fence. Or, for that matter, he could become a hermaphrodite, capable of literally "fucking himself". He decided to...