Have you ever gone to get a manicure and heard the manicurist tutting over your cuticles? If you don't moisturize your hands regularly, then having to trim cuticles can be quite difficult. If a cuticle is dry and trimmed too close to the skin, it can sometimes start to bleed. Nobody wants this, especially you. One way to avoid this situation is to add a slick of Vaseline over top of the cuticles before bed.
This keeps them nice and moisturized, and your manicurist will be smiling when they see what great care you are taking of your nails.