Lots of people say lots of things these days, and sometimes the things they say are actually true.

There are a lot of urban legends and phrases that get uttered so often that you just kind of assume they can't really be true. But as menshealth.com reports some of them are very true indeed. Here are some examples that might surprise you.

The hiccup scare. How many times have people tried to scare you when you're hiccuping? Think it's ridiculous? Well, guess what? It actually can work by interrupting the cycle involving nerve signals to your diaphragm .

Junk food nightmares. The jury is still out on this one, but some experts think sugar can affect brain function during sleep and may be the reason for nightmares.

The old cold shower. The cold water slows the heart rate causing blood vessels to narrow and, well...you know the rest.

Contagious yawning. Studies done show that if a person yawns, then the people around them will as well, so it is contagious, but no one, not even the experts know exactly why.

Isn't it funny that we just assume those things we hear over and over again couldn't possibly be true, but these apparently are. So next time you hiccup, yawn or say no to your husband, you'll be armed with science to back it all up.

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