Honestly, My hair loves heat and it loves to be stretched! Some women's hair will respond differently depending on the texture and strength of the hair. This method has been working perfectly for me and I do it every now and then when I'm in a lazy mode, don't feel like styling my hair, and just want to wear my hair out freely. I do many styles with my hair when it's blowed out such as this:
When wrapping it at night it's best to place a satin scarf around it because it keeps the hair flat so that in the morning it will be easier to comb. A satin cap may end up making it feel a little out of shape. Therefore, oil your hair and place your satin scarf tying towards the back underneath the hair like a ponytail and you're good to go!
Have Fun Stretching that Afro Out!