Coffee, much like beer and whiskey, tastes like crap the first time it hits your tongue, and just like whiskey it burns on the way down and makes you wonder why you wanted to try that foul beverage in the first place.
But then you start to feel the effects and the attraction to that caustic liquid finally makes sense, and according to this comic from The Awkward Yeti some people fall so deeply in love with coffee they want to marry it.
Personally, I prefer to keep my relationship with coffee strictly friends with benefits...
-Via Geeks Are Sexy