Knowledge flowed into his mind about the recent wish. Apparently, every night, the milk in breasts gets pumped out and stored for the next day; as a result, women become flat chested. In the morning, they can drink that milk to regain their breasts. If they don't drink it, their body will naturally make more milk, but at a very slow rate.
Zoe had been withholding her milk and saving every drop so she could have larger breasts for the dance. Jon thought she and his mother looked slightly different, as they were both flat.
Jon searched through his knowledge to find out what happens to guys who drink the milk. First of all, it isn't wise to drink another person's milk, as it will cause extreme nausea and pain. The effects often vary for women. Sometimes one breast will be larger than the other or even a third one could appear. Baldness, weight gain, and temporary blindness can also occur, so they usually don't drink another's milk.
For men, growing breasts, losing body hair, and a smaller manhood were common effects, along with gaining more feminine features, but they could never make their own milk. There were men who often drank women's milk, but they were looked down upon by society and deemed perverts.
Sure enough, as Jon looked down at his chest, he could see two small mounds start to press against his shirt as the pain in his stomach moved to his chest. They were oddly sensitive as he touched them, but definitely not a bad feeling.
