Sleep

When you are sleeping, you are not sad, happy, jealous, petty or lonely; you lack emotions as you are shutoff from your conscious feeling center.

You do feel hot and cold sensations as those are survival signals

When you jolt or have bladder calls, your psyche stand guard is letting you know someone/entity is in your sleeping area

The happier you are the less sleep you will require; unless you are healing or nursing an injury

Sadness increases the urge to sleep

No matter how hard you try, you will never remember how your dream started

Communication in dreams are always telepathic as dreams take place in 4D astral planes