I still maintain (if only for the comedy) that the reason can be perfectly bland...

{cue Weird Al voice}
"It's a quarter after one, there's a big hairy bug and I need you now.
I said I wouldn't call, but the toilet's overflowed and I need you now.
And I don't know what to do about it, I just need you now..."

But then, if I'm getting a drunken call at that hour, it really is probably more about moving furniture, so my view on the topic is perhaps a bit askew.