No. You cook the shrimp and then I just set it in the fridge. The onions and olive oil and salt and pepper and lime juice go in one bowl. All the other ingredient in another, once all chopping is done, combine the two bowls and tada!
The first time I had my friend show me what it was all about while I hid behind a couch pillow so the weirdos couldn't see me.
They should just call it The fapping channel.