KK has used lube since her 20's - mostly as a consequence of her preference for extended sex sessions. At some point, no matter how stimulated she becomes, natural sources deplete, and are relatively short-lived.
KK had a procedure performed in her early-mid forties, uterine ablation with combined Depo Provera treatment. At that point, into menopause, lube became an absolute necessity. We migrated to use of a natural product, in two forms; solid, food-grade coconut oil, and fractionated coconut oil (also known as MCT). Both forms we use are food-grade, edible, and water/soap soluble. Both forms are quick warming, long-lasting, and provide excellent lubrication for both vaginal, and anal sex, as well as use for manual/digital stimulation (finger-banging, toys/dildos, and hand-jobs), as well as for massage. They are unflavored, and safe to ingest, so it makes enjoying oral sex easy without having to clean-up/wipe-down the lube.