It's DELICIOUS. I used to think the same thing (eww!!! gross! raw fish! parasites!) until I married this half-breed Asian guy. He turned me on to the joys of kimchi (yeah, not so much) and sushi. (oh yeah baby, sooooooooo good!!!)
You have to start out small. California roll. Which is fake crab, or "krab," lol, which is actually cooked fish--pollock I think--that is chilled) and veggies. And from there, you get a spicy tuna roll, which is actually finely chopped up raw tuna mixed with like some kind of spicy mayo. And then you can stop there, or continue. Good sushi is like OMG FREAKING DELICIOUS. And if you can get it at half price during happy hour, it's so much better....