"Let's introduce our new student."

A naked Pat walked to the front of the classroom. The teacher put his hand on his shoulder and began talking.

"Class. this is Pat Arton. He moved in from the other world a little while ago. He'll be playing trombone with Emily Wasizaki. Any questions for him?" he said.

The first question came from a girl. "You like anal?"

"Uhh, I dunno. I haven't tried it."

The class gasped, and the questions came faster.

"What kind of sex do you like on a first date?"
"What kind of vaginas do you like? Innie or outie?"
"Do you go to bukkake parties?"
"What age girls do you like? Young, your age, or old?"
"Have you ever hired a prostitute?"
"Were you on a sex team at your old school?"

Eventually, the teacher ended the questions, and Pat returned to his seat.

Emily was masturbating furiously and looked relieved when Pat returned.

"Damned finally! I need some satisfaction right now bad," she said, bending over and aiming his penis towards her soft opening.

He looked around, and like she said, every student was either setting up their instrument or mounting their partner, usually bending over or kneeling on the floor to not be in the way of the instrument. Even the piano player, a boy about Pat's age, was getting his dick sucked.

"Oh! I forgot about rotation! It's your turn, Rachel." the teacher exclaimed, snapping the class to attention. The girl sucking the pianist's dick got up and went to the front of the room. Pat's mouth opened in shock as the teacher fucked Rachel in the pussy, as the students masturbated themselves or others to the scene.

"What's going on?" Pat asked Emily, who was jacking his cock vigorously and licking a nearby girl's breast.

"Oh, your old school didn't do this? Every day the teacher fucks a student. It's something all the art classes do," Emily replied. "I think I'm next week. You're new, so probably a month."

Mr. Williams and Rachel both groaned as they came. Afterwords, Rachel simply started walking back to the piano as classmates groped her, cum dripping out of her well-fucked vagina and onto the ground. She then resumed sucking the pianist's cock like nothing had happened.

Throughout the rehearsal, Pat tried his best to best despite Emily stimulating every inch of his body with her tongue and hands, and he came several times during the ordeal. Two times it landed on the students in front or him, and they barely seemed to notice. Their partner simply licked the cum off, and several returned the favor, spraying Pat and Emily with patches of ejaculate.

Finally the bell rang. Pat, who was exhausted from his concentration in playing and all the sex, was shocked to see how invigorated and energetic everyone else was. This must be why they're all so fit and attractive, he thought, all this sex is good exercise. But he didn't have much timer to think since all the students were rushing to the door to grab clothes out of the box and walk to their next class.

Pat then got an unexpected, cum-covered kiss from Emily, as she placed his hands on her breasts.

"That was fun, see you tomorrow!" she said, and ran off.

Pat, slow to put away his stuff, got to the clothes box last, and he saw why everyone was in a rush. People didn't take their own clothes, they took whatever was available. His clothes were on somebody else's body, gone, maybe forever.

He looked into the box, and retrieved its only item, a pair of ultra-short-shorts many girls in this world wore.

He quickly put it on. It barely covered his ass cheeks and was tight around his waist. However, it was barely long enough to cover his testicles, let alone his penis, which was pointed straight up out of the shorts.

He walked to Mr. Williams' office and explained the problem. The teacher pulled out his scissors and cut a hole in the front and pulled his penis through. The tight connection lifted the shorts, causing the bottom half of his testicles to be visible. He felt quite odd wearing only this very skimpy clothing.

"Looks good," Mr. Williams said. "I saw how exhausted you were even though Emily was trying to not wear you out too bad. I know your sexworld transition doctor gave you a permanent aphrodisiac, but it takes some time to kick in. Here," he handed Pat a tube of paste, "eat a little of this with lunch. It'll help. You'll need it, especially for this class."

Pat took the tube and looked at, and looked back at the teacher who nudged him on. He opened it, squirted a bit onto his hand. It looked like cum. He licked it all off quickly. "Thanks," he responded. He headed out the door and felt his cock rising and his energy coming back.