Twins can be either monozygotic ("identical"), meaning that they develop from one zygote, which splits and forms two embryos, or dizygotic ("fraternal"), meaning that they develop from two different eggs. In fraternal twins, each twin is fertilized by its own sperm cell. [Wikipedia]
We were fraternal twins, but my sister had penis envy so she forged documents stating we were swapped at birth. Her favorite part was the mental changes that compelled our speech to align with our new roles. Now, my brother loves to point out my womanly curves and tease me about my penis envy.
Barbara Crampton & Kathleen Kinmont- Fraternity Vacation (1985)
Barbara Crampton and Kathleen Kinmont - Fraternity Vacation (1985) VHS Open Matte
Your girlfriend provides an invaluable service for your fraternity brothers.
Barbara Crampton and Kathleen Kinmont -- Fraternity Vacation HD hybrid
Whenever my Fraternity throws a party, they never let me have fun. They usually lock me in a room upstairs, give me nothing but slutty clothes, and charge drunk, drugged up guys to fuck the shit out of me. If I wasn't locked in chastity id fight back, but now its the only way I get to cum.