A doctor did this. Before I get any deeper into this story, I want to point out that a person with the prefix "Dr." in front of his name—Dr. Christopher Culligan, a Canadian ER physician and instructor at the University of Toronto Faculty of Medicine, to be precise—is responsible for this mobile app that promises to infer a man's size based on a variety of factors. This criteria includes but is not limited to height, shoe size, butt size and whether the man is gay or straight.
We talk about a lot of different types of apps here at Android Police, but very seldom do we get to discuss an app that may actually save someone's life. WebMD for Android could be that app, and while I realize that may be a stretch, the possibility is still there.
This app really is an on-the-go doctor, as it offers a ton of extremely useful features. The symptom checker is a good starting point - it brings up a virtual body, where you tap the area that is troubling you, choose your symptoms, and then read about potential causes.