Purple X-Pill

From Uncle George's letter:"« Purple pills change your genitals (penis to vagina, or vice-versa), without changing your body. »"

Portraits
The purple pill only ever changes your genitals and is one of the few pills that has zero portraits affected by it. However, as sexual orientation is determined by your gender, taking a purple pill can be used to help you acquire the required traits to qualify for the queer portraits.