Sexual lubricant

A Sexual lubricant ("lube")is a liquid or gel used to prevent chafing or soreness during vaginal or anal sexual activity.

There are three main types of lubricants: oil based, water based, water soluble, and silicone based. Each has a different feel, advantages and disadvantages. They may be packaged in small 'single-use' sachets or small or large plastic dispensers.

Water-based lubricants

Water based lubes are generally safe for any situation, safe with condoms, safe with insertables, etc. The downside is that they tend to dry out faster than many other lube types. And, some have an unpleasnat taste. Adding a few drops of water will generally refresh the lubricity, but little helps with unpleasant tastes. Best to start with with a flavoured brand.

Oil-based lubricants

Oil based lubes last better than the water based sorts, but will be absorbed more readily and so more will be needed. This is not usually a huge problem, a far more important downside is the effect oil based lubes have on latex products, including condoms. Every oil based product will degrade a latex condom very quickly.

Silicone-based lubricants

Silicone based lubes last well, they don't seem to be absorbed as quickly as oil based, if at all, and have very high lubricity. Most are also safe with latex condoms. The downside of silicone lubes is the damaging effect they have on silicone toys. Keep silicone lube away from silicone toys. Using a condom on the toys is sensible as it limits contact with the lube, reducing the degrading effect of the lube. And makes clean up easier. Silicone lube is quite persistent and takes some effort to clean off.

Brands

There are a number of lubricants available, ranging from those sold in ordinary chemists (drugstores in the US) such as KY Jelly, to more sophisticated versions such as Eros and Astroglide, as well as specialised lubes purpose formulated for anal sex. Note that there is little formulation supervision for these product in many places and a trial is best; advertising is easy while effective formulation and quality control are both harder.

Other substances can also be used for the purpose, such as Crisco and butter.

Health issues

Take care not to buy or use a lube that contains spermicide if you have an suspicion you or your partner may be allergic or over-sensitive. Only latex safe lubes should be used with condoms - Vaseline is oil-based and does not qualify.