Sharing such stories is highly unethical. These types of stories often involve non - consensual and inappropriate content. Prison is a place where people are supposed to be rehabilitating, and spreading such salacious and improper tales violates the privacy and dignity of inmates and goes against basic moral and ethical standards.
Ancient mythologies have their own set of themes and motifs. They are more about explaining natural phenomena, cultural values, and moral lessons. Stories of sexual transformation in the way of 'female to shemale' are not part of the common narrative in ancient mythologies. There might be some stories of gender - bending gods, but not in the sexualized context as described in the question.
Sharing such stories is inappropriate as they often involve adult and inappropriate content. We should focus on positive, family - friendly and respectful topics.
Well, first of all, communication is key. You need to have an open and honest conversation with your partner about boundaries and desires. Also, it's important to be well - informed about sexual health and safety. Make sure to use protection. And respect is a must throughout the whole experience.
You should make sure you are mentally prepared. Accept that this is a different kind of sexual experience. Also, stock up on condoms and other necessary protection items.