Feminization via one's senses. The sight of feminine beauty, the sound of a feminine voice, the scent of perfume or merely the proximity of a woman, the feel of clothing you associate with your ideal of femininity - all of these charge up a resting set of feminine commands and suggestions. The perception of one's own form alters the more exposure to these stimuli occurs, and since this is a desire you already had, all that is really happening is a connecting bridge between your subconscious desire for feminine form and thoughts, and the conscious observations of these things.