Dogs in cars, on laps

Heading into work this morning and some guy in a PT Convertible had a little rat dog in the car with him, leaning out the window (as dogs usually do). However, the dog was sitting on his lap. Why aren't their laws against this sort of thing? Isn't it dangerous?

Driving while talking on a cell phone is dangerous. Checking emails on your blackberry or texting while driving is dangerous. Doing your make-up while driving is dangerous. You're telling me that having a dog on your lap while driving a car isn't just as distracting and dangerous? The mutt could get in the way or prohibit your arm movements while trying to maneuver the steering wheel. It's a no brainer IMHO.

Why isn't there a law against this?