That is just factually incorrect. Many plants produce the exact molecules or proteins that are used as hormones in humans. Hormones do much much more than influence breast size. In fact most hormones are completely unrelated to gender and sex. Ever felt stressed? Hormones. Ever felt hungry? Hormones. Actually … ever felt anything at all? Hormones. And plants do the same. They also feel stressed and they use some of the same hormones in the process.