Throughout your class, people are starting to experiment with their newly transformed bodies, indulging their instincts with each other. You can see newly transformed guys sucking girls' boobs or eating their pussies, and newly transformed girls going down on guys and having them fuck their pussies, and your own feminised body responds accordingly. Your nipples and clitoris feel intensely erect and your pussy is oozing juices, aching to get filled.
You turn to see the boy who was a girl sat next to you rubbing his cock, and carefully stand up, going to tap him on the shoulder. He looks up at you with lustful eyes and you kiss each other, your heart racing as he sits you on the desk in front of him. You spread your legs and he positions his cock, making you gasp as its head brushes against your clit. As you stare at his toned, handsome body, you realise even your arousal instincts have turned female.
He pushes inside you and you both moan eagerly at the sensation. His cock feels so large and so warm and so firm, and your body clings to it tightly and slowly stretches to accommodate it. He slowly starts to thrust in and out of you and you feel his head rub against the G spot deep inside you and his balls slap against your crotch with each thrust inside. His large firm hands cup your breasts and he pinches your nipples, and it feels intoxicating in its unfamiliarity. You notice his thrusting grow faster and more forceful, and realize he has even less restraint from his masculine arousal instincts than someone born a boy.
You cling to him and moan inarticulately, feeling more pleasure than you've ever felt in your life as you cum. Inside you, he reaches his own peak and you cling to each other as he cums, and the perfection of your hermaphroditic transformations is proved. His semen shoots inside you and his sperm swarm around an ovum deep inside your ovaries, one of them eventually piling into the egg and fertilizing it.
The two of you kiss messily, neither knowing nor caring that you've just become pregnant.