The two girls had invited their friend B over to their off-campus apartment that evening for drinks, and he showed up ten minutes late carrying a sixpack. Katy and Emma had been dating since their freshman year, and they had just met B the previous weekend at a party. They had struck up a conversation about sex, and as it turned out, B was into many of the same things as the girls were. Hence inviting him over for drinks. The girls planned to put on a little show tonight.
B had told the girls that he'd always fantasized about watching a lesbian couple have sex. He wanted to see what it was actually like, outside of the preposterous lipstick-coated world of lesbian porn. So there he was, sixpack in hand, slight hardon from his imagination on the walk over, standing in the doorway to the apartment smiling at the two beautiful girls.
Emma took the beer from him and Katy led him by the hand to a chair facing the couch. "Have a seat," she said. "We want to show you something." Emma sat down on the couch and gave Katy a smile.
B took off his jacket and sat looking at the girls. He hadn't said more than hello since he arrived. Katy put her arm around Emma and began to kiss her slowly. B watched their young soft bodies as they kissed, and smiled at how unbelievably awesome this was. Katy was slightly taller than Emma, with dirty blonde hair, tan skin, perky b-cup breasts, a slight college-girl tummy, and a bouncy round ass. Emma was a brunette with fair skin, small breasts, a soft round stomach, and an ass just like Katy's. B was enormously attracted to them, and had a solid hardon already under his jeans.