Dr. Wellhung, the testosterone is injectable testosterone cypionate which is in a cottonseed oil suspension. This is applied to the clitoris in this form
The technique I use (which I learned from one of my piercing clients who was an RN) is this:
First, I retract dear wife's clit hood as far as possible. When starting the process, this is very important and may be difficult as women with very small clits tend to have adherent hoods. When the hood is fully retracted, I apply about 2 small drops of the testosterone suspension to the clit shaft and glans. I then massage this in until dear wife gets into a rolling orgasm. When she finally makes me stop, the treatment is over. We repeat this daily.
Since we will be going on a vacation in a couple of months where we will be very isolated, we have started another course of the treatment. The goal is to get her clitoris to be at least 15 mm in maximum width before we leave. This should yield a permanent enlargement to about 10 mm width.