It was interesting to note some of the comments to recent posts. French Patrick (YourFrenchPatrick) states that when entering Denmark on a visit, one must sign a statement that nudity is acceptable. But, sadly, Danish youth are shying away from the trend.
Anonymous tells us he travels all the time via truck, bus, and RV, and frequently sees nude drivers. He continues that it is not illegal in many states - as long as you aren't jacking off.
But I do caution you: Before you drop trou and get into your car, or decide to release the girls, you should probably check the "indecent exposure" laws in your area just to make sure.
I once drove from Omaha to Cleveland in a convertible (top down) without a stitch on. It was a great trip! Got a few horn honks from vehicles that were high enough for their drivers to see into my car. Evidently it didn't cause too much of a stir because I never got pulled over by law enforcement.
We must continually push for acceptance of what nature provided.
And shed the shame of its functions.
Do you know what the nudity laws are in your city?