I have seen many 4s with short and very defined twas. After I bc'ed my hair was curly but I didn't realize how curly until I learned to properly moisturize it. For me proper moisture= defined curls and to do that I have to wash my hair several times a week, dc regularly and stay away from buildup. Others may have different methods. Now that my hair is long the no moisture no definition still applies. I use gels certain times of the year but they are not necessary for me but li is.
"A life without fame can be a good life, but fame without a life is no life at all." - Clive Davis