Sorry...but your knowledge of the law is incorrect. Merely touching someone is not an assuatlt...in fact it’s not even a battery. For your education and edification:
Assault: An assault is carried out by a threat of bodily harm coupled with an apparent, present ability to cause the harm...Generally, the essential elements of assault consist of an act intended to cause an apprehension of harmful or offensive contact that causes apprehension of such contact in the victim.
Battery: An intentional unpermitted act causing harmful or offensive contact with the “person” of another. The following elements must be proven to establish a case for battery: (1) an act by a defendant; (2) an intent to cause harmful or offensive contact on the part of the defendant; and (3) harmful or offensive contact to the plaintiff.
According to the criminal code of Canada:
265. (1) A person commits an assault when
(a) without the consent of another person, he applies force intentionally to that other person, directly or indirectly;
(b) he attempts or threatens, by an act or a gesture, to apply force to another person, if he has, or causes that other person to believe on reasonable grounds that he has, present ability to effect his purpose; or
(c) while openly wearing or carrying a weapon or an imitation thereof, he accosts or impedes another person or begs.
The section of the CCC website regarding assault can be found here.
http://laws.justice.gc.ca/en/showdoc/cs/C-46/bo-ga:l_VIII-gb:s_264_1//en#anchorbo-ga:l_VIII-gb:s_264_1
According to the criminal code of Canada:
265. (1) A person commits an assault when
(a) without the consent of another person, he applies force intentionally to that other person, directly or indirectly;
(b) he attempts or threatens, by an act or a gesture, to apply force to another person, if he has, or causes that other person to believe on reasonable grounds that he has, present ability to effect his purpose; or
(c) while openly wearing or carrying a weapon or an imitation thereof, he accosts or impedes another person or begs.
The section of the CCC website regarding assault can be found here.
http://laws.justice.gc.ca/en/showdoc/cs/C-46/bo-ga:l_VIII-gb:s_264_1//en#anchorbo-ga:l_VIII-gb:s_264_1