You get more into it.

The gorilla's cock was short and thick, which made for a strange sensation, considering your history teacher was much longer and wider. As the gorilla's fucking becomes more erratic, your jackal teacher continued. "Your assignment is to try at least five different positions, to find ones that you and your partner enjoy, and you each should orgasm at least three times, one of which must be in the vagina."

You feel the gorilla push deep into you and start to cum and join him in orgasm. "Class participation does not count towards your assignment," the teacher continues as the gorilla pulls out of your drenched cunt, and the lizard shudders.

Being on all fours, you couldn't see who replaced you, but whoever they were, they had a nice-sized cock with a thick bulge at the base. They wasted no time in foreplay using your previous partner's cum to lube you.

Your lizard partner started to cum in your mouth, both cocks squirting as the teacher scolded. "Now, Hep, this is a reproductive class; you should have cum inside her vagina."

You swallow his thick load as you continue to moan, and as he pulls back, you look at the teacher, "Miss. Oh God, yes," you moan as the bulge gets pushed into you. "When is the assignment due?"

"Thank you very much. You will give a presentation on Friday about your activities and what you did and didn't like. Now, as you are currently the only fertile member of the class," you moan at her words, "Who would like to be partnered up with our little human?"

You look around as a host of hands are raised, and you moan again. "Is that too many?" she asks you.

You shake your head as the guy behind you quickly pistons in and out of your cunt. "No, Miss, I think I can manage that."

"Good, anyone who does not have a partner to practice, you will need to find someone else. Shouldn't be too hard, but if you are having difficulty, come see me, and I will see what I can do."

You look over your shoulder to see the figure fucking you as a wolf just as he rams his cock hilt deep into you and starts to cum. Looking around, you know that you probably won't have to fuck all the guys today, as several students, either from their interest or arousal at watching you be gang bred, had started to fuck each other.

As the wolf finishes up in your cunt your eyes lock on a cute male otter quite well endowed for his size. "Come on," you say to him. You roll over onto one side and lift one leg.

The little otter sits astride your thigh before rubbing his cock against your lips. "May I?" he asks.

"Please," you say to him moments before he pushes into you.

Being the centre of attention in an anthro gang bang was pleasing you more than you thought it would. As the otter was fucking you, you looked up at the teacher, who smiled and nodded. She knew, somehow, she knew, you wanted this, to be used by the class, to be fucked, to be bred. You moan and shudder in orgasm, a long and powerful orgasm.