According to JetPens, the OHTO Fude's application is inspired by the Japanese tradition of writing cards for the New Year, and I can definitely also see using this for Christmas cards and Valentine's Day, editing/markup/corrections or, as I suggested, using it for love notes. :)
The reason for all of this conflicted confusion? That big ol' ball is just as menacing as HAL from 2001: A Space Odyssey. It's ginormous, and you can see that it means business. The color it puts down could be a tad darker for my tastes (in my opinion, the color is a bit on the pinkish-red side).
Look at that bubbly red ink - a dramatic appearance for a stick pen. I'm not sure how long the ink in this pen will last, especially given the diameter of the ball, but this pen is also not refillable, which is unfortunate.
At $2.50 a throw, it's not necessarily a "must try", but it meets a specific need and is a lot of fun to use. I received this one as a free sample from JetPens, but I always promise to tell it how it is.