Kneeling on pencils

[yub]

So though there might not be long term damage if you do it once or twice a month, maybe less. Though if you do it excessively it could end up causing damage in ways you hadn't considered.

Enjoy, just don't over do it.

Thank You for the warning, Sir. Since my darling started it, she does it indeed only about once a month, preferring the rice. None of the both lasts more than half an hour. Perhaps it is surprising, but pencils are not more painful than rice. Only in the first minutes. It feels very brutal then.