My 2 are indoor only, also. If I looked at them with a leash in my hand, they would bust out laughing, and rolling on the floor, while pointing at me, and making smart ass comments.
When I was a kid I had a big Orange Kitty that I used to like to take on car rides with my dad. I enjoyed Kitty riding in the car with us but my mom thought it was irresponsible and "What is there was an accident?". I realized over time that my mom was right and my dad was an idiot for taking orders from a child.