If you're touching the live end, it doesn't matter much. Electricity doesn't take the path of least resistance. It takes all paths. Think of it as a resistor n

If you're touching the live end, it doesn't matter much. Electricity doesn't take the path of least resistance. It takes all paths. Think of it as a resistor network: (+)---[R1]----[R2]-----(-) \--[R3]--/ R2 and R3 are parallel. R2 is you, R3 is the "path of least resistance". If R1 is sufficiently high, e.g. the light was off but the switch interrupted the neutral side, and you touched the neutral side (i.e. the lamp was between mains and you), then the "path of least resistance" matters: R1 and the parallel set of R2/R3 form a voltage divider, and the smaller the combined resistance of the right part is, the lower the voltage across you. That voltage is all that matters. If R1 is small enough to be insignificant, e.g. because you're touching mains and R3 isn't a short to ground, the voltage across you will be mains voltage.