This actually happened June of last year. I ran across this genre of videos and gifs called sissy hypnos. At first I wasn't really into them, but more and more I started to fantasize of being a sissy and sucking cock.
Finally the urge got so big that I decided to go for it. I went out to buy clothes that I generally liked seeing on girls and a wig. Saw a make-up tutorial, shaved my body and put on the clothes and wig.