There are some words that, not even bothering to take into account their meaning, can make your ears perk up and your insides dance. They're the good words. The ones that slide into your vocabulary on a regular basis, make you smile when you hear them, or just seem so easy to say.
Then there are the gross words... words that give you an instant awful image in your mind or make you want to throw up on yourself or on whatever is nearby. If your ears were a chalkboard they would be the nails. These words are usually driven by their very definition... a symbiotic nasty love affair.
Don't ask me why mine are what they are, rather think about your own... you know you've got some.