Whoa. I'm not sure I've met someone who doesn't like pineapple before. Mostly because the fruit is so blindingly delicious that I never suspected anyone held dislike for the food. I'm sorry you do not enjoy the utter deliciousness that is pineapple.
Tomato is a bit easier to understand, but most people (at least most that I know) grew out of that before they were teens, because, like pineapple, tomato is an absolutely brilliant fruit. The base of one of the five mother sauces in the culinary world and deservingly so at that. It's combination of acidity and sheer diversity of use make it simply fantastic.
Personally, I suggest getting past such dislikes, or you'll end up missing out on some of greatest dishes Earth has to offer.