Your script errors

• Only LocalScripts can access LocalPlayer, and Local Scripts don't work in Workspace.

• You were missing an end

In my solution, I got rid of these errors for you. I'll be using a regular script inserted into a part in workspace.

How to/Solution

I would suggest checking if the part's name is "Torso",

--Regular script
function  ontouch(hit)
    if hit.Name == "Torso"then 
        print ("ow")
    end
end

Script.Parent.Touched:connect(ontouch)

I added some fixes to your script as well.

But what if you have parts in your game named "Torso"?

I would suggest making sure that what touched the part was a Humanoid,

--Regular script
function  ontouch(hit)
    if not hit.Parent:FindFirstChild("Humanoid") then return end--Checks Humanoid
    if hit.Name == "Torso"then 
        print ("ow")
    end
end

Script.Parent.Touched:connect(ontouch)

Returns end if the part's parent doesn't have a humanoid

But what if it's not a player?

Check if it's a player,

--Regular script
function  ontouch(hit)
    if not game.Players:GetPlayerFromCharacter(hit.Parent) then return end--Checks for Player
    if hit.Name == "Torso"then 
        print ("ow")
    end
end

Script.Parent.Touched:connect(ontouch)

Returns end if the part's parent is not a character of a player

You could of course do this with arms and legs as well.

Hope I helped!

Good Luck!

If I helped you, make sure to hit that accept button!