Answer:
Major or minor I can be, when you touch me make sure you that you’re on the right key.
The buyer doesn’t want it, the producer doesn’t need it and the user doesn’t know their using it.
Both guys and women enhance their visual organs with this item.
How many bricks does it take to complete a building made of brick?
There is a woman in a boat, on a lake, wearing a coat. If you want to know her name, it’s in the riddle I just wrote. What’s the woman’s name?
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?