I never keep water on my nightstand because I'm afraid of spilling it. Last night, for some reason, I put a big full glass of water on my nightstand for no good reason. I wasn't particularly thirsty, it wasn't a thought-out reasoned exception to the rule, I just did it. Every night I climb into bed, remove my glasses, and with reckless abandon place them on my nightstand. I can afford to do it recklessly because I don't keep water on my nightstand. Well, you can see where this is going.
What hurts my brain though is that I don't keep water on my nightstand because I'm afraid I'll spill it, but the only reason I spilled it is because I don't usually keep water on my nightstand. A catch-22 I suppose (which reminds me I've been meaning to place that book on my "to read" list).