A farmer was trying to breed three sow hogs so he took them into town to the stud hog service. Once the hogs had finished breeding for the day, the stud owner explained, "If you see your hogs rolling in the mud, then they're pregnant. If they're basking in the sun, then the breeding was unsuccessful."

The next morning, the hogs were basking in the sun, so the farmer put them back into the truck and repeat drove back to town. The next day, the farmer noticed the same thing.

His hogs weren't in the mud, rolling around, so he figured they weren't pregnant.

Again, he loaded them into the truck and drove back to the stud service.

The next morning, the farmer couldn't bear to look at his hogs, so he asked his wife, "What are they doing?"

His wife responded, "Well, there's some good news and some bad news. The bad news is the hogs aren't rolling in the mud. The good news is they're already in the truck, and one of them is honking the horn!"