Rubbing in Circles

When I am slightly aroused I will lay down on my back naked with my legs spread apart. I usually bend my knees and pull them towards my body. Then I take my index finger and place it in the middle of the clitoral hood. (when I say that I mean the entire tube-ish lump) Then I start rubbing in a circular motion, starting with small circles. I move upwards toward my body at the base and rub in bigger circles. then I apply more pressure and rub in large circles around the entire 'tube-ish' area, feeling how round and smooth it is. Sometimes here I will fantasize that it is a guy's penis. then I move toward the actual clitoris in smaller circles again. I never actually touch the clitoris itself. I keep doing this in ways that feel right.