Most of the writting your going to see out there online is due to the comercialization of the porn industry overlapping with the bdsm fettish scene and will most liekly be focused on humiliating or degrading the subject, but not all calligraphy fetishism nessesarally involves such things.

Writing on skin can also be very sensual, with a hint of the forbidden or involve different levels of spiritualization and ritual as well.

Both have their respective places.

"The Pillow Book" is a good semi erotic movie for those interested in the non-humiliation aspects of this paticular fettish .