First started using different oils to regenerate OLD dry skin, guess from old age. Noticed much more sensitive feeling after awhile and when I totally stopped using any of the water based lubs a rash that had developed, mainly on my back and legs went away. Hasn[t been back. Makes the cost of the liner cheap.
I do like the way it feels, very smooth, and it’s easy to add a few drops as it soaks into my skin. Seems I reach a point after half an hour or so where my skin and the liner are saturated to the point I can go a long time without adding any. Also get varying degrees of drag as it strokes me.