"If only she could bounce it on my cock", Laura said. The remote beeped in her pocket, but she was too busy being under Ms. Mounds' fat ass, the teacher riding her. She as Ms. Mounds' favourite due to her four arms she used to grope both Mounds' boobs and ass. The teacher took about about 15 cms of the large cock since there was no way the whole cock would fit, but Laura complained nonetheless.
"Oh come on -ungh!~ I'm sure you can take it -hmmwhooole~". The remote beeped and Ms. Mounds was rapidly bouncing her ass, taking Laura's full length in her, moaning loudly. Laura could see her cock leaving an impressive bulge in Ms. Mounds' belly. It's rumoured that Ms. Mounds' serious attitude hid a secret, slutty side to her that was the reason she ended up in the masturbation class in the first place. It's said that she specifically trained her pussy to take on futa cocks.
"Hmmfuck, Laura!~ You're so biiig~", Ms. Mounds said. With one last moan, Laura cummed and Ms. Mounds said "Again! Agaiiin~". The remote beeped and as everybody in the class came, they were ready for their second orgasm. Futas, unlike men, were able to cum multiple times from their dick. They tended to be more horny than the norm because they produced so much semen, so they adapted into having very short refractory period.
As Laura and Ms. Mounds continued to fuck for the whole class...