The Professor tapped her foot. Arms crossed across her large breasts. Anger twisted her face with a growing frown. Behind tiny librarian style glasses, an evil glint shone in her eyes.

The green house was located on the University's back acre of farmland. Hardly anyone came out to the fields of corn and potatoes, unless they wanted privacy to make out, and only a handful of people knew about the tiny greenhouse. His hand gripped the handle to the sliding glass door. Frozen in that predatory gaze, he stammered "I..I... don't know...I know you... said not to clean in here...but I couldn't ..."

She sighed and swayed forward, releasing her arms, he watched as her tits bounced with every step. Mesmerized by the dance with gravity, he felt his cock stir to life. Somewhere in the back of his mind, he knew his 9 inch erection would be obvious in his shorts, but the thin t-shirt's outline of a stretched bra pushed common sense out of his frontal lobe.

The clicks of boots had stopped and he felt his face heat with embarrassment as he realized his eyes were still locked on her chest.

"It's my fault. I told the University to send me a female lab assistant, but they only had you. The University believes that the Physics/Math department will bring in all of their alumni and patent money, so they ignore the Biology department. They don't care what I work on and I don't care to tell them."

His balls were starting to ache and he could distinctly feel a cool patch at the head of his cock from pre-cum. Still unable to lift his eyes from the huge tits and erect nipples, he mumbled, "umm humm."

"Well. It is obvious my research is on the right track. I am glad I came when I did. You almost opened the door behind you. I wouldn't have wanted to miss your reaction. It will be years before my research will be legal for human trials, but you can volunteer to help me as my assistant."

"umm humm?"

She spun him around to face the glass case. She pressed her breasts to his back as she opened the latch. Lowering her hands, she traced the pulsing cock with a fingernail. "Yes you are going to help me immensely." He could feel her hot breath on his neck as she unzipped his shorts and fished out his meat. She cupped his lemon sized balls as his cock pulsed up and down with his heart beat.

"You are dripping on the floor," she coed in his ear. "I think you are ready to see my pet project." She pushed him towards the open sliding glass door of the mini green house. "I feed Petunia, that is my project name you see, yes. I usually feed Petunia bull or donkey, but I have never fed her man meat."

They shuffled into the jungle of the greenhouse. The air inside was intoxicating. He could feel the sweat bead on his skin and moaned as her hand gently slid up and down his cock. He lost track of time as she led him into the green house by his penis. With a start, he realized he stood naked before a large plant in the middle of the greenhouse.

The vines and green leaves swayed forward. A thick vine the size of a light pole emerged from the foliage. It looked like a pink and orange anaconda slithering from a bright green shrub. The head of the anaconda-like plant was a basketball sized tight bundle of orange and pink petals. The petals pulsed and seemed to sense his dripping cock. The plant stopped in front of his groin and the petals opened slightly. His pulse quickened, but he couldn't move.

"Petunia is a genetically engineered cross between over a dozen plants. That pollen and dust on the leaves comes from Petunia. It has, well, obvious effects on male animals. A few lab rats mounted Petunia one day and my research took a lucky turn. She doubled in size from their donation and I have been feeding her every week."

She reached behind the mass of petals and pulled the plant head forward. She pulled his balls down and leveled his cock at the "hole" made from the fleshy petals. The petals closed on his cock head and gripped tightly. He moaned as Petunia coated his cock with thick liquid and inner petals vibrated trying to coax his whole cock inside.

"Petunia usually gets fed tomorrow, but since you are here and willing to assist, why don't you just slide that treat into her?"

The Professor was breathing heavy into his ear and the petals did look inviting. In fact, the more he looked at them, the more he felt they resembled a dripping pussy.

He slid his cock deep into the plant. The petals were slick with the warm liquid and he could feel the petals tighten around his shaft. Vines crept up his legs and circled his cock and balls. The plant was not going to let him pull out. The petals vibrated and tiny tentacles slid down his piss hole massaging his prostate. He looked down and saw Petunia had swallowed his cock and balls. He couldn't feel his balls, but they were definitely inside the plant's mouth. With both hands griping the iron hard husk of Petunia's head, he ground his groin against the soft vibrating petals. Eyes rolling back in his head, he coated the insides of Petunia with his seed and gasped as the vines tightened.

"Ohhh that is a good boy!" The Professor orgasmed in his ear. Her breathing was ragged and her nipples were stabbing his back. He could feel her hands furiously working between her legs. She had released his cock and balls to the green embrace of Petunia. He looked down and tried to pull his still erect penis from Petunia.

"Oh don't try to get away, it only makes her grab harder and if you keep trying, then she uses thorns. Don't worry. That slick goo she secrets is a numbing agent. For my research, let me know when you regain sensation. It takes Petunia about five minutes to dissolve and digests a frozen bull cock and balls."

Her words spiked his adrenaline and blood drained from his face. He came again as Petunia pulsed her petals in punctuation to his genitals death sentence. Using both hands he tried to pull away in vain from the herbal assault. He felt the inch long hooks sink into his balls and the dull ache as they popped before he passed out.

Petunia supported his unconscious body as she devoured his meat. The Professor kicked his rump and frowned. "Great, now I will need another assistant to help me find out when the numbing toxin wears off."