Lazy? Not at all. Efficient? Absolutely. Eating over the sink eliminates the need to pull your "dinner" out from the microwave and place it down on a table-like surface. That is potentially precious seconds wasted from eating - we're starving, remember? Besides, who has time to set the dining table anyway (I don't even own a dining table), let alone light a candle? And isn't there something a little pathetic about setting the table for one? It's like drinking champagne alone.
Single girls have been trained and conditioned to eat over the sink. Remember when mom was stressed out about daddy's job and would eat over the sink when she cleaned up in the kitchen after dinner? (You knew you got your emotional eating habits from somewhere!) Or remember those times in the sorority house late at night when you had to eat over the sink in the kitchen downstairs so your sorority sisters couldn't see you shoveling food down your face because you didn't want them making snarky comments about your weight? (Plus you didn't want to be that girl who threw up in the bathroom every night. "Food poison," indeed.)
We like to eat over the sink when we really need just TWO bites of ice cream, when we're getting ready for work and can only manage to make a bowl of cereal for breakfast and eat it while running back and forth between the kitchen and bathroom with a mascara wand in one hand and a spoon in the other, or when we've just come home from the bar (starving, of course) after figuring out a polite way to turn down that guy our friends set us up with, all the while thinking about that frozen bean burrito from Trader Joe's sitting nestled in the freezer.
Eating over the sink means potential messes are a non-issue (single girls like running water and plumbing). You see, one thing single girls dislike is cleaning.