Class started and Mr. Hank began right away into his lecture about genetics. Jen scrawled notes quickly as he spoke about heredity and recessive versus dominate genes. About half way though the lecture he started his normal slide show. The slide show began explaining how certain breeds or species of animals could produce offspring while those offspring would most likely be sterile. The first example Mr. Hank showed was a lion and a tiger producing a liger. He assured the class that while very rare this did in fact happen.
After that he moved on to a far more common example. The mule. When the slide came up that showed the pictures of donkeys Jen's pencil faltered, her eyes locked on the big male donkey that Mr. Hank said was called a jack. She could see his huge donkey cock sticking out from beneath his furry body. Her mouth clenched shut. She could feel her pussy tighten and become wet. She blushed and looked down at her desk, praying to god that no one had noticed what had happened. She made it through the rest of class, thoughts of the donkey running through her head.
When the bell rang she stood and left quickly. There was really no chance she would ever have to act on such a perverted thought. She couldn't even remember the last time she saw a donkey in real life. She headed out intending to go find the little bastard Kyle and make him undo this but instead found herself in the library. She found herself looking over picture after picture of huge hard donkey cock and even found a few women who let themselves be fucked. When the librarian started for her she turned the computer off quickly and rushed out of the room. She had missed half of second period which she shared with Kyle and furiously embarrassed she headed to wait for him outside class.