1 definition by rrrachelzhh
a very cool branch of study that involves inspecting various physical and chemical properties of the human penis. Some branches of Penisiology studies length, diameter, volume. Deeper studies also include smell, taste, and deep-throatability. If you are extreme, you can study the melting point, boiling point, and the point of decomposition. Manuel data collection is required in most cases.
Rachel is an expert on Penisiology: she has collected data on 1487192 dicks in her school; yet she still refuses to give a blowjob to her boyfriend. How sad.
by rrrachelzhh September 2, 2018