I was basically unaware of transexuals/shemales until a few years ago. I was surfing the internet and ran across a site called "hot tails". It is a cartoon story of a cute high school girl who goes to the school nurse with a "problem". She reveals to the nurse that she has a cock. At first the nurse acts shocked but then takes the girl into the examining room and sits her on the table. she lifts the girls skirt and proceeds to eagerly suck her cock. They both enjoy it and the nurse invites the girl to come back when she needs more "therapy".
This story clicked something in my mind and I have been interested in sucking a girly cock ever since.
