Don’t order the pesadillas!

Okay, I’ve been learning Spanish (I have one of those internets on my desk) for about an hour a day for several months now, which I think pretty much makes me an expert. Certainly, I’m qualified to give advice about the talking of it. Now, a lot of time in Spanish you can make a plural by adding an s. But not always. Like, even though “tu” means you, you would never ask the names of several people by saying “Como tus llamas?” That would lead them to understand that you wanted to consume their herd of Peruvian pack animals.