One gender, Two roles, Four positions

Jack blinked he was sure the girls had left or were going to leave but he guessed they didn't maybe he imagined it the teacher then switching to the next slide in the presentation. "Ok class so now we understand that other species have two genders let's discuss why humans only have one. Humans are all one gender we call Futanari we both possess a penis and vagina which both produce thier respective reproductive cells the sperm and ovum. However humans are different to other animals in the way that we can be impregnated or impregnate both sets of genitals or rather certain members of humans can achieve these things, you see whist our body's might not look to different humans have specific roles within reproduction which become apparent after sexual maturity. The first role is that of the 'giver' whose body will grow during puberty in such a way that allows them to impart their sex cells via ejaculations with the second role the 'receiver' who receives these ejaculations. The receiver grows during puberty in such a way that allows them to be able to accept sex cells from the giver during sex and allows thier body to account for internal impregnation and gestation of any embryo eggs created by the sex. As you can see from the textbook the pre puberty form of all you girls looks very similar, you all have your penises and sacks as well as behind them your clitoris, urethra where you all pee from and the vaginal hole behind that as well as your anus too. Puberty is also difficult to see much changes between the two but it is clear when you look in the right place as too which role you will have and it will become obveous as to what you are when you become an adult, this will happen tomorrow. Once impregnated the reciver incubates the fertalized ovums inside them till they grow into larger eggs to be layed and selected for keeping. Of course a reciver can hold vast quantitys in both incubation chambers called wombs one in the abdomen and one on the ball sacks and they are quite elastic and expandable particularly the womb sacks which never strain or break no matter how full they are. Both genders experience periods and heats from both reproductive organs to internally clean and increase want and need to breed and of course the recivers have a laying period where incubated eggs which are ready to be layed are oviposited back out. All the changes will happen tonight as you sleep so you will wake up to more knowing your role."

"If you are a receiver your sacks will grow significantly to account for the new wombs (or incubation chambers as they are known) inside them as well as your vaginal hole gaining a womb/ incubation chamber internally connected to it which feels like it's near your belly. Your womb sacks will have tubes connected to them for sperm to feed into. Sperm leak from your internal testicles into your incubating womb sacks and the testicles which will be housed in the midrif of your body infront of your other womb which has it's own set of Fallopian tubes which connect your ovaries to your ovum womb. The vagina connects to the womb via a vaginal canal to recive sperm as well as your penis connecting to the womb sacks as a reciving channel for givers ovums. Both the penis and vagina on receivers are biologically constructed for reciving genetic material ejaculated into them a receivers strong multiple orgasms trigger motions internally to pull or suck in payloads given to them in either hole"

"If you are a giver your testicles will drop into your sacks and grow in size with increased sperm production. The vagina will develope to be tight and contain internally a space of which creates a snug pocket to hold the recivers penis in place whilst the giver ejactulates ovums into it. The internals of the vagina connect to Fallopian tubes which lead to ovaries which like the testicles will have grown and become more productive. Both the penis and vagina have prostates internally connected to them which produce semen which carry the sex cells when ejaculated."

"Of course with these biological features this results in 4 potential sex role positions during intercourse two for each role. For the recivers 1. Vaginal receiver which receives sperm into thier vagina, 2. Penile receiver which receives ovums into the penis. For the givers 1. Penile giver ejaculating sperm into the vagina of the reciver, 2. Vaginal giver ejaculating ovums into the penis of the receiver. All positions are interchangeable so you don't have to do just one also there isn't any real benifit except pleasure from it but couples of receiver receiver or giver giver can for-fill both roles but pregnancys cannot occur from these partnerships. Anal is also a sexual game to explore some might like it more than others but there is no benifit to it over regular sex. Of course tomorrow you will be matched together with your new life partner who you will always live and breed with but it's also quite common that you chose small groups of couples or large communal groups who share each other regularly it is of course good to create diversity in the breeding pool plus it's just nice to live with lots of sexy horny people right. But the choice is up to you how many people you and your partner chose to live with, typically once you decide to keep and raise children it's normally common to separate from larger communal orgies but too each thier own."

"This concludes the lesson for today but feel free to go to the bathrooms and get a good look at yourselves before you change, your pre pubescent bodys will be gone after today so remember them fondly before you embark on your new adult adventure tomorrow. Ah and yes as you all know you will be having a school sleepover in the gymnasium which should be set up with roll matts for you to put your sleeping bags or blankets, pillows and duvets on so feel free to go to the sports hall and chose your place. tomorrow you will wake up in school and sort yourselves into role then you will be matched up and can have your first times. If there is odd numbers then partners then either you will be moved to find one elsewhere or one will be provided from other sources."