Fact #2: Bieber Fever is blazing new trails of weirdness.

So there's a neuroscientist who said "Bieber Fever" is a real medical condition, because listening to "Baby" releases dopamine in the brain. Which is true (if painfully obvious) and makes a good headline. Congrats doc, your name's in the paper.

(Original GIF via lunatictoons)

But let's get into the real weirdness of Justin Bieber fans. Because sure, Elvis and the Beatles drove girls crazy and all, but only Justin Bieber fans organized an online campaign to nickname their favorite pop star's penis. FYI, the nickname is "Jerry" and it trended on Twitter for a week.

(Original GIF via lunatictoons)

And a lot of "Bieber Fever" behavior is that type of harmless-weird, like this this Miami mom who got a radio DJ's face tattooed on her butt in exchange for Justin Bieber tickets for her daughter. It's the kind of back tattoo that speaks volumes.

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Also, that tattoo is something you can cover up and doesn't hurt anyone, so who cares? It's not really affecting anyone's life, unlike when Kim Kardashian was in a silly photo with His Biebness and then received an avalanche of death threats.

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Or when the police uncovered a murder-castration plot against Justin, hatched by a man who self-describes as a big Bieber fan.

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And then there was this week's IRL horror show perpetrated by 4chan with the #cutforbieber hashtag hoax [WARNING: GRAPHIC IMAGES IN ARTICLE]. The idea was to convince Bieber fans that there was an online movement to get Justin to stop smoking weed by having fans cut themselves and posting it online. That's right: some 4chan users found this idea funny.

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Whether or not the #cutforbieber tag got any traction, it was a crazy-irresponsible prank that could have hurt kids. It was the sick, cruel version of 4chan's #baldforbieber hoax in October 2012, which convinced people to shave their heads as a message of support for their allegedly cancer-stricken pop idol. Justin wasn't actually sick, but a lot of heads got shaved to comedic effect.

(GIF via)

Death threats? Murder plots? Sociopathic 4chan "cut yourself" hashtags? Let's hope they're only happening on the outer fringes of Bieber Fever, because here's the thing about the Justin Bieber phenomenonÂ…