To dream that you cannot complete the sexual act is a sign of a feeling of impotence; the basic problem is that you feel a lack of enthusiasm and energy to face a situation. It is a symptom of laziness, of a negligence that will end up affecting your work and personal relationships. This episode is evidence that your ideals are very high, but you let yourself fall into comfort and easy options. The impossibility of connecting to your essence is detrimental to your creativity.
In most kids, lack of sleep can surely result to ADHD (Attention Deficit Hyperactivity Disorder), which is the opposite with the adults. Children between 7 and 10 who gets less than 8-hours of sleep every night will likely to become inattentive, impulsive and hyperactive. Their sleeping patterns can easily affect their brain.
One of the reasons why people always get involved in road accidents is that, they are tired while driving, or that they lack sleep. Many people do not realize that their performance can be highly affected by having not enough sleep. Sleep deprivation can affect reaction as well as decision making, not to mention that it could make a person unable to drive well. It goes the same with drunk driving.