Long lustrous female hair is generally rated attractive by both men and women across cultures. The prevalence of trichophilia (hair partialism or fetishism) is 7% in the population, and very long hair is a common subject of devotion in this group.
The good morning is a great exercise to help strengthen and develop the lower back and gluteal (butt) region. The primary muscle groups for this exercise are the lower back and gluteal region but also, the hamstrings get a great deal of work from this movement.
The key to doing the Good Morning (or any exercise for that matter) is to start off light and build up the weights gradually over time with progressive overload. You have to master perfect form with light weights before attempting to lift heavier.