Not everyone does - if you need a fan to sleep, cohabit with someone who prefers calm silence at nighttime and watch the arguments begin. But some people have disturbed sleep without a fan on.
There are a few different reasons:
1) Noise. "White noise" can be conducive to sleep and relaxation (many sound machines offer a white noise setting). The combined sound of the blades, motor, and airflow can be very soothing. Reference "road fatigue" as an example of how repetitive white noise induces drowsiness.
2) Breeze. Temperature preferences aside, some people enjoy the sensation of a breeze on the face, and/or the sound of air buffeting the ears. Again, this can be a relaxing sensation.
3) Security. This is the emotional type of security - if someone sleeps with a fan every night and then spends a week in a strange environment, having that fan available during the night can make the person feel more "at home;" a familiar, soothing sound. Or perhaps the perceived "creepiness" of nighttime (small creaks or noises in the building, etc.) that is muffled by a running fan. If someone started sleeping with fans during childhood, the fan can become a "security blanket" later in life.
Well I know your a big fan but, you really don't need to know when Selena Gomez goe's to bed.
Different people have different ways they like to sleep. You may like a fan to sleep with. Other people may have to use a TV to help them sleep at night. It is about your comfort and what helps you to sleep comfortable.
we to sleep to get energy
An electric fan is both a luxury and a need. Some people do not have air conditioning and they need a fan. This makes it a need, especially when its hot. A fan is a luxury when the need is not there.
Need fan blades for avion cieling fan
it need 7hours sleep for health
PHHHT serously!! we need a sleep cuz we bein tired!
older
they sleep like we sleep and they sleep why we sleep because we need energy and strength
My doctor has told me that tweens need 9 hours of sleep a night! A Sleep Doctor should tell you to sleep 10 hours of sleep not 9 hours. Now Adult can sleep up to 6 hours, there bodys don't need that much sleep:)
You need 8 hours of sleep, and you have to be in deep sleep at 1-4 a.m.
Athletes need more sleep so they can be less tired when they need to perform.