There are men whose very appearance can compel you to turn your head in disgust, muttering the word "douche" in a long whisper. They're flexing in their skin-tight t-shirt, invading women's personal space at the bar and going on and on about their goddamn promotion. For all the times you've muttered, "What's the deal with that douchebag?" science has actually taken the time to answer what was probably a rhetorical question. Advertisement

5 The Egocentric Douchebag Continue Reading Below Advertisement The child who screams "Look at me! Look at me!" is all grown up and he can't wait to tell you about himself. You want to talk about the football game last night? He'll talk about how he quarterbacked his high school football team to the state championships. Wondering about a good place to grab a bite to eat? He'll tell you he can make reservations anywhere because he's the man. Concerned about poverty in Africa? Why the fuck do you care! This dude has banged like twenty models! Seriously, you're talking to a legend, and he'll be the first to remind you of this fact. The Disorder: Histrionic Personality Disorder or HDP. The disorder is characterized as an overwhelming desire to be noticed and willingness to engage in any attention-seeking behavior. This was the kid who was the first to jump off the high dive--if there was an audience to watch him. Continue Reading Below Advertisement These drama-queens know all the world's a stage, and they have been cast for lead role of MacD'bag. Those with HDP have a self-esteem that is dependent on the approval of others and they posses no clear concept of self worth. They're way more likely to lash out at criticism or disapproval than they should be. They'll flirt with anyone, any time. They tend to mistake any attention as sexual attraction ("I'm tellin' ya, she totally wants me, bro"). Their opinions are easily influenced by others, and they find it difficult to support them if pressed for details. They travel in packs. The disease is not socially debilitating, since most sufferers maintain good networking skills, but they manipulate these relationships in a way that brings notice only to themselves. Thusly, sufferers of the disease tend to pass their suffering onto us. Continue Reading Below Advertisement