Kim.

"Alright everyone by descending order of grade will now choose a partner for the next part. Remember you cannot refuse more than two offers and the last two will be paired no matter who they are." Said Mr Wilder.

Josh walked in front of the class to make his pick. He could have anyone in the room. He could have changed the rules to get his teacher or his sister. But he really wanted to finally make love with his high-school crush.

"Kim will you be my partner? " he asked.

" Of course, I was afraid you'll pick someone else. " she said. A lot of boys (and girls strangely) grumbled. Josh quickly understood why. The boy with the biggest dick and the girl with the biggest boobs were now unavailable.

He gave himself such a big dick to have fun but didn't count that all the girls would now be attracted to the really popular well hung new him.

All the other students paired up. His sister ended with Fred a fellow nerd from high school who always had a crush on her. (and not a chance before the changes.)

The formerly popular ended grouped together. People had to be careful that their twin and themselves wouldn't be the last two remaining. Brian and Monica were the last two to pick someone and ended paired with Olivia and Jeremy an other pair of footballer cheerleader siblings.

With the muscular chests of the boys the girls looked even more flat chested. (an hard task with no boobs at all.)

The two teachers then removed their bathrobes to reveal their perfect bodies and the massive member between Mr Wilder's legs.

"We will now demonstrate the two things you will be graded on later so look closely and take notes if you need to. But first, everyone naked! You will make a chair circle around us with a chair for each team. Once naked the boy will sit on the chair and the girl on his lap. You should get used to this because the bathrooms, restrooms and locker rooms are co-ed at High-school +. " said Ms Mulligan.

Josh undressed without complexes knowing that he would have nothing to be ashamed of. He looked closely at the striptease Kim made for him and he was hard as steel when she sat on his lap with his huge dick rubbing on her pussy. To make sure she wouldn't fall of Josh put his hands on her tits for the dual pleasure of the touch and of hiding them from others.

Other were not that lucky as their dicks were so small they either couldn't get erect or didn't reach the girls even with them sitting on their lap. And they had nothing to grab on their partners.

The test would be rather simple. The girls would be graded on the quality of the blowjob they would give their partners. The boys would be graded on their ability to fuck their partners to an orgasm.

Ms Mulligan dropped on her knees and began to give Mr Wilder a very sensual blowjob. She had to use both hands to hold his shaft while she kissed the head. She then began licking the whole length of it while gently playing with his balls.

Finally she put the end of it in her mouth while stroking it slowly. Then doing something that seemed barely feasible given the size of it she proceeded to deep throat him, swallowing the whole length of it and making him fuck her mouth balls deep.

Mr Wilder twitched and after carefully extracting his dick from her throat she locked the last drops of cum from it.

"This was the test for girls. You don't have to deep throat your partner for a passing grade but what I showed you was what you have to do to get a perfect grade. " she explained. Josh had an inkling that Kim with her competitive nature would aim for just that.

" We will now test you on that to let me some time to recover before the next demonstration. " said Mr Wilder.