Pen cap: on or off?

Chapter three of my Simplified manual says I should always remove the pen cap when writing, but doesn't give any reasons.  Maybe it's because a capless pen is lighter, thus easier to carry across the page.  I always write with the cap on for two reasons.  First, I don't want to lose the cap; second, it feels wierd to write with a such a short instrument as a capless pen.  Do Pilot Precise caps really weigh that much?  Does anyone actually write with the cap off?

Shorthand: isn't it about time?

(by johnsapp for everyone)

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