What's with yoghurt and fish?

It's the 31st January and I am sitting in my apartment. My parents are here. My mother who is one of those fabulous mother cooks has just made my littlest, fish in the mildest of spices and breadcrumbs. He is loving it. Not the best when it comes to spicy food, he likes his food on the milder side and if he had his own way would have natural unsweetened yoghurt with everything. A dollop of yoghurt on the side or a good glass of lassi as you may have heard, is the best remedy for a very spiced up meal. He is in heavan here in the Middle East as yoghurt and laban and all flavours of yoghurt drinks line the fridges of supermarkets and therefore line the shelves of our home refrigerator. It really is not unusual to find him dipping small pieces of Arabic bread or paratha into yoghurt or mixing big dollops of that sour stuff with fluffy rice or downing gallons of flavoured yoghurt drinks. There is something about him and yoghurt. He is so unlike his older brother who deplores the stuff. How different can two children be! The older one was eating and enjoying the hottest and spiciest food at 2 years of age whilst the slight taste of a chilli on the little one's tongue would send him into a panting fit. Of course the yoghurt would make everything better!

There is an interesting notion here in the Middle East as one would not recommend mixing yoghurt with fish. It is something I must get to the bottom of as it is something I do not entirely understand. Perhaps it is digestive. If anyone has any answers do let me know. Otherwise of course some googling will reveal all.