We all love to travel the world and most of us preferred to be seated by the window, staring at the clouds and captivating sceneries below. But did you know that there are people who have "aviophobia"? It is the fear of flying that could be associated to one of many other types of phobias, which can be linked into airplanes or air travel.

Happy are those who do not have this kind of fear, but will you be able to get a bit of that fear if you would know airline industry's dark secrets? Fearless insiders reveals on an online forum, Quora , some of the not appealing way of serving customers on flight.

1. There's something in the water

Long hours of flight make passengers thirsty but beware of what you're drinking. "Do not ever drink water on an aircraft that did not come from a packaged bottle. The ports to purge lavatory waste and refill potable water are within feet from each other and sometimes serviced all at once by the same guy," one concerned traveller commented. "Your coffee is made of the same water coming out of the bathroom sinks. And most of them have a hundred times bacteria over the govt limits," another one added.

2. The dirtiest of them all

Food trays are for food but sometimes used for changing diapers too. Yahoo New Zealand reported, "Last year Travel Math sent a microbiologist to test the surfaces aboard aircraft and the results confirmed the confession. Tray tables were found to be the dirtiest of all the locations and surfaces they tested."

3. Not a ghost, but it's included

Some freight is shipped on commercial flight including dead bodies. This is sad but true.

4. Hope that your pilot is awake

"Your captain and crew are usually exhausted. They're allowed to be on duty without a break for up to 16 hours," one testified. "Pilots make mistakes all the time about airspeed, altitude, landing, etc. But they're corrected on time and therefore they never tell anyone about it," she added.

5. Sleep tight

You wrapped that complimentary blanket and pillow so tight, think again. They're not fresh, usually just refolded and back to the bins after used. I think someone's going to love your perfume later.