Is it really that hard to believe that a CS student in his mid-twenties is too lazy to shower, put on clothes and leave the house? :)
nope.
I have been there (literally), I agree that eat mostly of habit and hunger can be easily replaced by water/coffee. My blood sugar would drop significantly though after 24h-36h and I would feel dizzy. Were you drinking sweetened drinks?
Your blood sugar really shouldn't drop while fasting, unless you do aerobic exercise, have a genetic mutation that prevents you from producing glycogen, or have some other kind of glycemic disease.