I don't know what's so HUGE about slapping some texturizer in your hair which looks exactly like what Craig David did. I have seen his hair in videos and photos and it was a lot tighter curl where the ends of that look almost straight.
If your hair has a definite curl pattern (not everyone does) then if you learn to keep it properly moisturized it should curl up.
Low porosity, high density, and fine
4a/3c, mod-CG, itchy prone scalp
Natural 4 Life