Does your hair have to be straight to do rag curls or can it be like a poofy curly and work when you use the method?

You don't need straight hair to achieve rag curls; you can use the method on poofy or curly hair as well. Rag curls work by wrapping sections of hair around fabric strips, so as long as your hair has some length and is manageable, you can create curls regardless of its texture. Just keep in mind that the final result may vary based on your hair's natural curl pattern and texture. Experimenting with different section sizes and wrapping techniques can help you achieve the desired look.