Why is this PARTIALLY doing my script?

script.Parent.Touched:connect(function()
	script.Parent:FindFirstChild("Humanoid")
	script.Parent.CanCollide = false
	if
		script.Parent:FindFirstChild("Humanoid") == false then
		script.Parent.CanCollide = true
	end
end)

Supposed to turn the brick's CanCollide to false if a Humanoid is touching it, and when the player is not on/in the brick, cancollide goes back to true.

All this script does is turn the canCollide to false and it stops there.

You HAVE to check for the humanoid BEFORE ANYTHING ELSE.

script.Parent.Touched:connect(function()
	if script.Parent:FindFirstChild("Humanoid") then
		script.Parent.CanCollide = false
    elseif not script.Parent:FindFirstChild("Humanoid") then
        script.Parent.CanCollide = true
    end
end)

you didnt check for it. you just sent an empty request. it finds it but doesnt know what to do with that info

EDIT: So it sent the empty request and moved on to setting it to false, then checking for the other condition. (Note: elseif is better practice)

REEDIT:

script.Parent.CanCollide = true

script.Parent.Touched:connect(function(hit) -- oops forgot this important part
	if hit.Parent:FindFirstChild("Humanoid") then
		script.Parent.CanCollide = false
    end
end)

script.Parent.TouchEnded:connect(function(hit)
	if hit.Parent:FindFirstChild("Humanoid") then
		script.Parent.CanCollide = true
    end
end)