Often, this is simply a thicker gel rather than a liquid. When the lubricant eventually dries out, it may leave behind a residue derived from the other ingredients in the formulation. Some anal lubricants contain numbing agents to relieve discomfort during anal sex, although it is generally inadvisable as a lack of sensation makes accidental injury more likely. Carrageenan has also been shown to be a potent inhibitor of human papillomavirus infection. They also cited silicone -based lubricants as a potential alternative, although they did not test any silicone lubes in their study. Many men in Japan use lubricant created specifically for onaholes such as the Tenga Egg.
Silicone-based[ edit ] Silicone -based lubricants are usually formulated with fewer than four ingredients and do not contain any water. Personal lubricants are particularly useful for intercourse when a partner experiences dryness or excessive contraction tightness of the vagina or anus. Sexual activity[ edit ] A personal lubricant can be used to increase pleasure and reduce pain during sexual intercourse or other activities and may be used for lubricating the penis , vagina , anus , fleshlight or dildo or other sex toys before or during activity. The Population Council , in a study, tested commercially available water-based sexual lubricants, and found that many damaged human rectal cells and that some of them - those containing polyquaternium - appeared to actively increase HIV replication in cell cultures and therefore could raise one's risk of HIV transmission. Many men in Japan use lubricant created specifically for onaholes such as the Tenga Egg. Water-based[ edit ] Water-based personal lubricants are water- soluble and are the most widely used personal lubricants. Some lubricants are conveniently packaged for ease of application. Some contain botanicals such as aloe vera or plant extracts. The earliest water-based lubricants were cellulose ether or glycerin solutions. Many of these types of lubricants also market themselves as "natural" and do not contain paraben, glycerin, DEA or animal-based ingredients. Because of strict FDA guidelines for medical devices, organic personal lubricants were no longer allowed to carry a USDA seal for Nude Personal Lubricant, and that it should be very careful about using the term organic anywhere on its label. Commonly used lubricants include saliva , oil such as baby oil, olive oil , canola oil , or mineral oil or commercially available lubricants that are either water-based or hydroxyethylcellulose-based. This thicker consistency is preferable because it helps the lubricant stay in place. Some lubricants are sold together, such as "hot and cold", or are marketed for a specific use or effect. Products available today may have various agents added for even dispersal, moisture retention, and resistance to contamination. ANSI and NSF have partnered with organic certifiers around the country in order to provide a definitive set of compliance guidelines for organic lubricants and other personal care products. They also cited silicone -based lubricants as a potential alternative, although they did not test any silicone lubes in their study. Water-based 'lubes' have been recommended for use in safer sex because they do not weaken condoms like oil-based lubricants do. Often, this is simply a thicker gel rather than a liquid. Scientists are testing whether anti-retroviral lubricants or gels can be applied to aid in the prevention of transmission of HIV. Silicone-based lubricants are not absorbed by skin or mucous membranes and consequently last longer than water-based lubricants. Some newer water-based lubricants are formulated with natural skin moisturizers, such as carrageenan , and may not leave a sticky residue after evaporation. When the lubricant eventually dries out, it may leave behind a residue derived from the other ingredients in the formulation. Vaginal lubricants[ edit ] Vaginal lubricants are used to reduce vaginal dryness and pain during intercourse, and by couples trying to conceive. Hand lotion is often used for recreational masturbation and popularly seen as an alternative to lubricants created specifically for sexual intercourse. Anal sex generally requires more generous application of lubricant since the anus does not have natural lubrication sufficient for most sexual activity.
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