I held one multimeter probe to a `3.3V` source, the other probe I held in my hand. The voltage measured between these 2 points was around `0.1mV`. How is this possible? I expected `3.3V` since I thought my hand was a ground?

What I find at least as strange is that when I held one probe in my left hand and one in my right the voltage is larger than the former measure(around `2.3mV`!! But it fluctuates much more though)