I added marshmallow root powder to an oil i'd been using (masturbation, jelq, etc.) and the result was what I wanted -Thank God of course -that is that the oil (blend of olive oil, cocoa butter and grapefruit essential oil) became much more slippery. Thought I'd share that adding marshmallow root to an oil or perhaps other type of lubricant might well aid in slipperiness/ using less oil to get the job done.

May we be peaceful and do good/not what we hate
PEACE BROS