why do cats like to eat fishes?

Hi there... many cats will eat just about anything their favourite humans eat, however most people do not realize that there are ingredients in human foods which can be toxic to cats such as for example onions and garlic--both which cause Heinz Body Anemia. Additionally, most people are very unaware that cats naturally do not eat fish--it was man that began serving fish to cats years and years ago and Hollywood films glamourized this along with feeding milk which also isn't good for cats because cats are lactose intolerant. Fish causes vitamin B1 and E deficiencies in cats and over time this causes a life-threatening disorder called enteritis. Here's a link which explains why fish/Tuna are bad for cats: http://answers.yahoo.com/question/index;_ylt=ApQl0TksA2nc0kXEZaiuXRkjzKIX?qid=20070111170528AAiAKat Here's a sample list of what human foods cats should avoid eating and why: http://www.peteducation.com:80/article.cfm?cls=0&cat=1276&articleid=1029 Sources: 27 year friendship with a veterinarian Feline nutrionist to exotic and domestic cats