All of the following require the use of gloves EXCEPT

In the context of nail technician services, the use of gloves is important for maintaining hygiene and protecting both the client and the technician. However, during a plain manicure, the procedures typically involve non-invasive activities that do not require contact with bodily fluids or potential contaminants as with other options.

Plain manicures usually encompass trimming nails, shaping, and applying polish, which do not expose technicians to significant risks requiring glove use. In contrast, eyebrow hair removal, nail enhancements, and pedicure services often involve working with skin, potential blood exposure, or chemicals that necessitate wearing gloves for safety and sanitation purposes. Thus, the correct answer highlights that plain manicures are the only service listed that typically does not require gloves.