Hyundai's sister company Kia has given the world an interesting insight by coming out and stating that 20% of all relationship breakups are due to driving habits of either partner.
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Research shows that driving with your 'other half' is the ultimate test of love, with one in five singletons admitting to ending a relationship after arguing with a partner about their driving. So why not find out how suited you are in a car before you start going out? - Kia UK

Right. I think the more important point that Kia has obviously overlooked, is that 1 in 5 relationships end when the couple buy a Kia. Nevertheless, the obvious publicity stunt led Kia to devise a plan to match up 20 men and 20 women after doing a compatibility test... when paired in a car. Kia said they will see how the new couples progress.