The Zoologists/A book on "Animal Mating Habits"
Lisa finds some reading material. A book on different animals. Not sure what the word Mating was on the front she opens it.
The first pic was of a Horse and how to milk the cum from male horses and inseminate female horses.
The pics of the male horse show different breeds and the differences between the different species. Lisa was just looking at the pics, the size of the horses dicks. Thinking how good daddy's cock felt after it had stretched her show couldn't image how one of these massive things would be able to fit.
Next were dogs. She was looking at the different breeds. They then go on to the anatomy of the dog. The sizes where closer to daddy's. One image that got her attention was the knot. Reading 'The dogs not is there to make sure no semen escapes the bitch is inseminated'.
David finish's his conversation.
"Right Lisa, we have a chose" he looks at the book that she quickly put down. A massive smile goes over his face.
"Do you want to go see the Monkeys or the Red Pandas"