My partner is Natalie. [XL]

A lump forms in my throat, what if I draw a tiny condom like Kyle or what if it's some ridiculous monstrosity, but I can't show any more hesitation than I would normally so I simply pluck one of the condoms from the top.

My sigh of relief is short lived as I nearly cum along with my expanding cock, It had sounded rather pleasurable but I wasn't prepared for having an almost orgasm just from one small change.

I pull my hand out of my pants as I leave the line of guys, most seeming to have no changes, while some give looks of dread or relief before almost collapsing as their cocks grow or shrink.

Natalie mean while is happily chatting up a bored Matilda as she wags her bubble but around.

"Hey Nat," I simply greet my partner expecting her normal eye roll.

"Like, hey John!" She beams as Matilda rolls her eyes before Natalie lifts her ass up,"You ready to like pound this!"

It takes a moment for me to do anything other than gawk at her jiggling ass that seems like it's about ready to rip through the barely held together jean shorts, only her giggle pulls me back as I respond with a playful slap that sends my cheeks burning "More than ready Nat."

"C'mon. I know you can slap it harder than that," She giggles shoving her ass backwards, but I can't act any further as Mrs. Dawson takes her position behind the desk with a confident Martin taking up position behind her.

"Now guys whip it out," The near simultaneous sound of zippers going down and pants dropping to the floor fills the room, the only break being those 4 guys who had been unlucky to draw the small condoms.

While trying not to be a perv I check out a couple and my heart goes out to them especially Matilda's partner that for a second I thought had a prominent clit instead of a maybe 1 inch dicklette that hung limply.

"Dude, are you like gay, stop gawking at cock and whip that bad boy out, unless it's like tiny." Natalie giggle shooting a mean glare at the unfortunate guy next to me.

With an angry snort I drop my boxers plop my python onto her cheeks with an audible plop. The two girls beside her simply gawk, but I don't want Natalie to see it just yet as she wiggles trying to turn around.

"Dude, you're such a tease." She pouts giving up and folding her arms under her bust.

"Okay, now to start off you should just like slide her panties to the si-" Mrs Dawson voice cuts out in a moan as the teacher's pet gets ahead of her, "OH GOD! Just like get to fucking!"

I may be a bit over eager as I pull down Natalie's shorts to find she's absolute soaked and commando.

"Bet, you'll give a pump and then," She starts to chide. A quickand harder than I was planning deliver a slap to her right cheek and leave a hand print behind for a moment.

"H-Hey! No slapping, we haven't reached the B-BDSM and rough play parts!" Mrs. Dawson tries to scold over Natalie's moan and the rather eager plapping of her partner.

"Sorry," I give weakly as I tease my head against Natalie's dripping slit. Her nails dig into the desk as she shoots me a look half way between excitement and worry.

"L-Like, you aren't TO BIG? Are you?" She asks.

"Probably not." I give a shrug before thrusting in sending her back arching and moans of "Oh God".

Despite being so wet I find her surprisingly tight and not surprisingly not a virgin.

"G-go slow." She pants and a small part of me wants to go against her, but she's to tight for me to do anything faster than a steady pace for the next few minutes.

The first guy to tap out is Matilda's partner as he gives a weak groan after a minute and leaves a rather unsatisfied looking Matilda.

"Geeze Jason, I guess you are really a limp dicked sissy." The moans of Jason changing spur me on to thrust harder lest I suffer a similar fate to him.

"John...Harder!" Natalie gasps as her cheeks bounce with each thrust and she nearly falls out of her bra.

The next to earn Martin's ire is Louise's partner, this far down I can make out the pixie cut tomboy looking rather bored as her partner lazily pushes rope.

"Nick, hey I get it being you're step dad's squeeze toy is tiring." Martin pats him on the back and sends on top of Louise, squirming as she simply doesn't seem to register.

"John! I-I'm," Natalie gasps as I feel her tightening around me and I almost stop as I hear Martin calls out my name.

"Hey, man props, didn't expect it from you." Martin chuckles not stopping his pounding of Mrs. Dawson and almost ending my thrusts as Natalie moans in front of me as she tightens on my cock.

I feel the thickest load I've had coming as I pull out of Natalie as spatter her back with three sticky loads.

"L-Like, Goooooooo," Mrs. Dawson praise ends and drowns out the next two biting remarks that ends two more guys hopes of keeping their manhood.

The only thing that keeps me up is the desk Natalie is panting on as the rest of the class finishes, most of the women seem rather jealous of Natalie and it looks like only 2 others having actually brought their partners to completion.

Worst of all it seems that now the women outnumber the men with only 7 guys remaining.

Nick seems to have been turned into a bleach blonde bimbo with obviously fake breasts while Jason true to Martin's words is a rather meek looking sissy in black cat thigh socks and nothing else currently.

"Later losers, I've got a date with a ginger prude to teach a lesson to!" Martin simply waves from the door only stopping when he's half out,"Oh guys remember the rules of sex-ex, each load you give the more of a bimbo you become and sluts the more loads you get the hotter you are!"

Mrs. Dawson doesn't even seem to register him as she continues, "Okay! We'll move onto the oral portions, girls pick a guy to share!!"

Natalie with a giggle glomps onto me while the unsatisfied women and changed men eye me up. With a jolt I realize that if I continue then I'll likely end up like Natalie or worse Mrs. Dawson, also I can't stop Martin if I stay stuck in this classroom.

"Uh...Mrs. Dawson." I call out raising my hand as I try to cover myself earning a pout from Natalie.

"What is it stud." The teacher purrs as she doesn't bother looking away from my cock even as her over endowed "assistant" seems eager to start.

"I-I need to go to the bathroom." I stammer as Natalie jumps up shouting "Me too!"

"If you don't want to participate then you can go to the princ-pri- Head Mistress!" She glares trying to be intimidating as she grips her "assistant's" massive rod.