The person driving should only get sovereign control over the radio if that person does not qualify for the car-pool lane. If your wife is in the seat next to you, it is in your best interest not to irritate her. If you know she hates a song, change the station! If she says she loves a song, turn it up! Music elicits an emotional response; do you want your woman upset riding shotgun? Don’t mess this up. If your wife hates a song that you like and you roll your eyes or audibly sigh when you turn it off, all you will do is remind your wife that she married a man whose music she detests.