I used to have a Yorkshire sow that liked to go for rides in the car. If she heard my car start, she'd jump over her fence and come running up and rooting at the door. I would let her in and she'd ride shotgun. She was always very polite and whenever Madonna wanted to go to town, she'd get french fries.
One day she got too big to fit in the front seat. I had to buy a van. By then she was about 800 lbs and I made her a ramp that went up. Until she died at about 11 years old, she went to town at least once a week.