(1)  An assault is the act of intentionally applying force to the person of another, directly or indirectly, or attempting or threatening by any gesture to apply such force to the person of another if the person making the attempt or threat has, or causes the other to believe on reasonable grounds that he has, present ability to effect his purpose; or the act of depriving another of his liberty.

(2)  Words alone cannot constitute an assault.

(3)  An act which is reasonably necessary for the common intercourse of life if done only for the purpose of such intercourse, and which is not disproportionate to the occasion, does not constitute an assault.

(4)  Except in cases in which it is specially provided that consent cannot be given, or shall not be a defence, an assault is not unlawful if committed with the consent of the person assaulted unless the act is otherwise unlawful, and the injury is of such a nature, or is done under such circumstances, as to be injurious to the public, as well as to the person assaulted, and to involve a breach of the peace.