Sitting at a seminar, “Who needs a pen?”.
From behind me I hear “I have a pen” (implicitly “That I can lend to someone”).
From behind me I hear “I have a PINK pen”.
Suddenly the pen sounds more attractive.
Why should adding an adjective make it more attractive?
Because it is now more rare.
A pen is a pen is a pen.
But a PINK pen is a special pen, to be coveted.
Add an Adjective!