Linked from
The 10 pages that link to Lubricant, each with the reason it gives.
HandjobRelated: Lubricant can reduce friction during manual stimulation.
AllotropeRelated: Graphite’s layers slide readily, making its structure useful as a solid lubricant.
Mammary intercourseRelated: Lubricant can reduce discomfort from friction during the practice.
Sex positionRelated: Reducing friction can make some arrangements more comfortable.