What should a barber do if a client has extremely long hair?

Consulting with the client about their desired length and style before cutting is essential in the barbering profession. This ensures that the barber fully understands the client's wishes and expectations for their hairstyle. Each client may have a unique vision for how they want their hair to be cut or styled, particularly with long hair, where the potential for various styles and lengths is vast.

Engaging in a consultation not only establishes a connection with the client but also enhances the overall experience by allowing the barber to provide personalized service. This practice helps in avoiding misunderstandings and ensures that the end result aligns with the client's preferences. Furthermore, it aids in assessing the hair's condition, texture, and any specific challenges posed by extremely long hair, allowing the barber to prepare appropriately for the cut.

The other options do not align with best practices in barbering. Cutting hair without prior discussion can lead to dissatisfaction, while refusing service could alienate clients. Applying hair products before a cut may interfere with the cutting process, as hair products can affect how the hair behaves during cutting. Thus, the approach of consulting with the client is the most professional and effective way to handle the situation of extremely long hair.