Could my penis grow if I inject myself testosterone?

Thou shalt not... Thou shalt not inject thyself with testosterone to grow thy penis unless an endocrinologist has determined that there is a deficiency of testosterone, and that there still remains growth potential in the penis (growth occurs during childhood and adolescence). Testosterone shots, gels, and patches are available to those who have hypogonadism and low testosterone.
I'm Confused. I hope this is not too rude of a question, but how does a 24 y/o female have a penis...Anatomically speaking that is? Gyn, please explain.