The author of this is unknown.

The class in Animal Husbandry at A&M was studying reproduction. As a project, the professor assigned three students to take a bull to a nearby farm to service a cow there.

Hours passed, and the students had not returned.

More hours passed, and still the students had not reported back. The worried prof went to the barn. The bull was in the stall; the three Aggies were lying on the ground, battered and bruised, clothes torn, and completely exhausted.

“What happened?” asked the prof. “Did the bull give you trouble?”

“Naw,” replied the Aggie spokesman, “he cooperated, but we had an awful time getting the cow on her back.”