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Hank gives you five MORE reasons why you should probably avoid smoking, or quit if you already smoke - in addition to those big ones you already know about. These are the weird reasons.

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We all know that smoking is bad for you. There's even a possibility that there was a horribly frightening advertisement before this video featuring some person who talks through a hole in their throat. You shouldn't smoke, and you know the reasons why. Or do you?

:Sci Show intro plays:

There are in fact some really surprising and weird reasons not to smoke in addition to all of the normal horrible ones and we're going to talk about a few of those now.

Number one. Smoking makes your boobs sag. That's right. Boob shagginess is a real scientific studied thing and among the risc factors are being overweight, having larger breasts, having babies and smoking cigarettes. Things that do not affect boob shagginess whether or not you breastfeed, weight gain during pregnancy and lack of upper body exercise. So now you know!

Two. Like listening to music? Watching movies? Hearing things? Smokers are 70% more likely to develop hearing loss than non smokers. Even worse: development of hearing loss in smokers happened much earlier than in the general population. Smokers start losing their hearing in their 40's or 50's instead of their 60's or 70's.

Number three. If you're not worried about saggy boobs because you don't have any boobs allow me to scare the cigarette right out of your mouth. Men who currently and formerly smoked were about 30% more likely to suffer from impotence. While you, and maybe even your lady friend might think that that cigarette sticking out of your mouth makes you look super sexy, it's not going to matter if you can't get it up.

Four. If you don't care what you look like or whether you can get it up and you don't have any kids and you live alone with a bunch of dogs and cats, think about their health. Second-hand smoke has been proven to cause nasal and lung cancer in dogs and malignant lymphoma in cats. This might seem inconsequential compared to the human health risks but 37% of smokers said that clear evidence that smoking was bad for their pets would motivate them to quit.

And finally, number five. You like being happy? In a study of more than seven thousand adults smokers were found to be less happy than non smokers and ex-smokers who had quit more than one year previously. Healthy body healthy mind I suppose. Too bad those things are so freaking addictive. My strategy which has worked for me thus far is to never let one of those things anywhere near my mouth. I suggest you try it too.

Thank you for watching this episode of scishow. If you have any questions or ideas for future videos please leave them down below in the comments or you can get in touch with us on Facebook or twitter. And if you want to continue getting smarter with us go to youtube.com/scishow and subscribe. We'll see you next time.