Writing in the Accident Analysis and Prevention journal, a team from Tampere Institute of Technology reveals the results of a study in which 6000 people were asked if they had actually had any kind of accident - or had nearly had an accident - while using a mobile.
  yes. they are called wet dreams. when a man sleeps hes usually dreams about sex, so when you have sex you ejaculate in there dream they are having sex.
This is technically called penile tumescence. Therefore, morning erections are secondary to the timing of REM sleep and the natural physiological processes that are associated with this sleep state in men. It seems that the body is testing systems during sleep, and this is a normal and healthy phenomenon in men. It may even be noted in young children.