The visual nature of dreams is generally highly phantasmagoric; that is, different locations and objects continuously blend into each other. The visuals (including locations, characters/people, objects/artifacts) are generally reflective of a person's memories and experiences, but often take on highly exaggerated and bizarre forms.
The most common emotion experienced in dreams is anxiety. Other emotions include abandonment, fear, joy, happiness, etc. Negative emotions are much more common than positive ones.
The Hall data analysis shows that sexual dreams occur no more than 10% of the time and are more prevalent in young to mid-teens. Another study showed that 8% of men's and women's dreams have sexual content. In some cases, sexual dreams may result in orgasms or nocturnal emissions. These are colloquially known as wet dream.
While the content of most dreams is dreamt only once, many people experience recurring dreams—that is, the same dream narrative is experienced over different occasions of sleep. Up to 70% of females and 65% of males report recurrent dreams.
A small minority of people say that they dream only in black and white.
In this extract of the movie "Gainsbourg". Serge Gainsbourg has some hallucination, seeing his "gueule", his face, talking to him while he is asleep.