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.
The relationship between masturbation and prostate cancer is a bit hazy. A 2003 Australian study published in BJU International linked frequent ejaculation early in life with reduced risk for prostate cancer later on. In both these studies, ejaculation frequency included sexual intercourse and masturbation.