From what I've heard, drugs like 1-(1-phenylcyclohexyl)piperidine (PCP); crystal meth[amphetamine] (crystal, ice, crank, hillbilly freebase); and all the various cocaines, anesthetize legs, arms, hands, feet, and genitals, and sometimes even torsos,heads, and internal organs. Each of these three drugs started out as legitimate medications with a variety of different therapeutic applications. One application all of them had in common at "birth" was anesthesis, the numbing of either locations, the whole body, or either.
The logical thing to do, then, is to do what they do in martial arts movies with their hands, what American cops are trained to do with their guns and other nations' cops are trained to do with truncheons, etc.: Take out the knees and elbows until your assailant can no longer move and/or grab/shoot/hit you. Simultaneously go for the eyes with as much pressure as you can till they pop or dislocate, then go for the Adam's apple with force and a heavy, hard, metal object, preferably a sharp one (the emergency window breaker that comes with automobile safety kits is ideal. The aim here is to shatter the Adam's apple, which is brittle and made of cartilage, and surrounded by blood vessels that feed directly into the trachea. It's hard to rape or kill when you're in pain and drowning in your own blood). Pulling on the outer ears as if you're going to lift your assailant up by joining them together at the back of the crown of the head like shopping-bag handles to tote the scumbag around is good, too. Use enough force and you can deafen the perp and give him the Gift of Tinnitus forever and ever. Also, hurts like a million cotton bud shoved full-force into the ear canal at once.
This is all courtesy of the local Chinese bodega/grocery owner, who learned it from the Maoist version of Stranger Danger programs. I think this advice is much better than the advice we give children in our country. They said anyone wishing to be a good comrade and who wanted the Chairman to be proud of his or her fortitude would assault the child-raper as viciously as humanly possible, causing as much pain as he or she could, for the Betterment of the People's Republic.