Why can't a pen be heavy? What if it the outer cylinder was thick solid brass? My husband and I have the thick metal capital one visa cards. Everytime I handed it to a store clerk overseas (sometimes they say it here too), they would exclaim, "wow, this is heavy". If a credit card can be heavy why not a pen? Someone would just mean it is heavier than what they are accustomed to for that class of object. Haven't you ever picked up a heavy baby? I have. I've had parents say their baby is heavy before handing them to me. Does it mean that the baby is heavy relative to a car or a stack of gold? No. It means they are heavy relative to an average baby.
Seriously, why are people constantly nitpicking every other sentence here?
I wouldn't call it nitpicking at all. I often learn very useful language tips from what you seem to regard as nitpicking. Many of us hold words and grammatical patterns in all languages in high esteem, and we like to share questions, thoughts and even humor as an active part of our learning while enhancing our admiration for the world of language.
I happen to have an unexplainable admiration for Arabic since I first ever heard it spoken and saw it written. The explanation must be karmic. I can't speak Arabic yet. Without making conversational Arabic a goal, I just plod along trying to learn. I always admire it and derive artistic pleasure out of reading, pronouncing and forming the letters on paper. Each Arabic letter, like a precious mineral gem, ignites a response of delight in me which never becomes trite or stale. Each Arabic letter is like a musical composition in itself.