Oil based irritants have no safeword.
If you put irritating oil on a tender bit of your anatomy, you may be stuck with the sensation for up to twenty minutes. Hot water, close quarters and abrasion intensify irritants. Hot baths, tight clothing, plastic wrap bondage or broken skin means a much more intense effect if you use a skin irritant. When first experimenting with an irritant, start with a diluted quantity and try it out in the following order, preferably on yourself first. Good items for insertion are cucumbers and Japanese eggplant.