I sing in the car sometimes. It's totally different from using a mobile phone - for one thing, no one is listening, nor am I listening to anyone else. This means I can and do stop singing instantly if there's a need for particular concentration on the traffic etc (or if I 'm listening to the radio, I switch it off at such times). I think one of the main problems with a mobile is that a driver is trying to communicate with someone who's not present, and that requires a different sort of concentration and continuity.

There are times, like driving on quiet roads at night, when I find it actually helps my alertness to sing. Driving can be monotonous, and I find my concentration can lapse because of mental under-stimulation as well as over-stimulation. Singing or listening to the radio keeps me from getting dozy while driving.

Anyway, maybe it's a male/female thing - we women are simply better at multi-tasking, aren't we?

Marje