“The Fellatio Modification Project” is my application of the biological techniques of dentistry and the tissue engineering. In this project, a series of oral transformation is conducted. Via the bodily transformations, this project aims at the enhancement of the sensory pleasure during the oral sex behaviour among the groups of gay men. In my point of view, usually, the purpose of the technological application is to cure illness so as to restore patients the normal physical function; however, this project is aimed to extend the oral function by the practice of the dental medicine. In the field of dentistry, there are three main functions of the oral cavity, aesthetics, pronunciation, and mastication. What’s innovative, my project is focus on the fourth function: sex, which is left unspoken and undiscussed on the textbook of dentistry. Yet, the physical pleasure of orgasm is never seriously discussed but a constantly practice and pursuit of people. Specifically, the scope of my project will be narrowed down and focus on the gay culture. I want to discuss the interrelations among sex, technology, human and society during the absolute pursuit of physical pleasure. Also, I herein raise a question about how far it is the possible extreme and intention of the corporal transformation. My project will be divided into two sections, one is ‘the Male Masturbation Cup Mouth’, and the other is ‘the Bird Beak Clone’.