One thing that people who don't like cats always say is that they are anti-social, that they aren't affectionate, that they're aggressive.
Those of us who have felines at home know that, although our own aren't like that, there are some cats that have more difficult temperaments than others. (A bit like people, right?)
In any case, we can all admit that at least some cats can be difficult. A study at the University of Helsinki recently delved into this idea and discovered why some cats are prone to such a bad temperament.