The victim is one whom the actor knew or should have known was physically helpless, mentally defective or mentally incapacitated. Aggravated sexual assault is a crime of the first degree. An actor is guilty of sexual assault if he commits an act of sexual contact with a victim who is less than 13 years old and the actor is at least four years older than the victim.
Sexual assault is a crime of the second degree.
Aggravated criminal sexual contact is a crime of the third degree. Criminal sexual contact is a crime of the fourth degree. A person commits a disorderly persons offense if he does any flagrantly lewd and offensive act which he knows or reasonably expects is likely to be observed by other nonconsenting persons who would be affronted or alarmed. He exposes his intimate parts for the purpose of arousing or gratifying the sexual desire of the actor or of any other person under circumstances where the actor knows or reasonably expects he is likely to be observed by a person who because of mental disease or defect is unable to understand the sexual nature of the actor's conduct. Provisions generally applicable to Chapter 14 a.