Pink curtains

A blonde entered a store that sold curtains and told the salesman she wanted to buy a pair of pink curtains. He showed her several patterns but the blonde was struggling to make a choice. Eventually she selected a pink floral print.
“What size curtains do you need?” asked the salesman.
“Fifteen Inches”, replied the blonde.
“That sounds very small. What room are they for?”
“They’re not for a room”, said the blonde. “They’re for my computer monitor.”
The salesman was baffled. “But, miss, computers do not need curtains.
The blonde said, “Hellloooo! … I’ve got Windooows!