Well, reason one is to make sure nobody hears what you are listening to, just in case it is private. Reason two is so you do not disturb people around you with music.
"The program allows the user to change speech to text. You do not need headphones to use Dragon NaturallySpeaking. However, if you do not use headphones it will require you to use a microphone."
Your headphones can get ruined if you use them in the rain only if they get in contact with the water.
Headphones do not use batteries, they use a power source such as an iPod or mobile phone.
As long as your computer has a sound care, you can use headphones while on it. Just plug the headphones in the the red/pink input on the soundcard.
The headphones are only for music, not to read the book to you.
Any type of headphone is fine - but don't use i-pod headphones !
Yes you can use headphones in Call of Duty: Black Ops
You can use Normal PC headphones and speaker too and Iphone/Ipod headphones will work too
All headphones with 3.5 mm are functioning with your iPod.
a dj uses headphones to hear the next song that will be played
No, the music will play from the speakers if you do not use headphones.
You can use the headphones for something else; or give them to someone else.