Speaking of artificial insemination of cows...
The assignment in one of my college courses was to do an "informative" speech on our area of study or expertise. In the class was a guy who had done AI on cattle in his home country of Botswana.
For his speech, he had some of the equipment as a visual aid. Included were some, ahem... "cartridges" for the semen gun.
One of the students had a question, and in giving the answer, our speaker placed the semen gun against a full-scale drawing of a cow's plumbing he had made on the chalkboard. He pressed the trigger, and... Let's just say he had to go down the hall to the restroom to get some paper towels.
It's clear that he violated rules #1 and 2 of safe semen gun handling:
1. All semen guns are always loaded.
2. Do not allow the muzzle to cover anything you are not willing to inseminate.