In a 2001 study of youths ages 15 to 21, researchers found 33 to 50 percent of youth said it was important for the condom to fit tightly, leaving no air space at the tip, and that petroleum jelly, such as Vaseline, is a good lubricant.
Using expired condoms, having intercourse for any length of time before putting on a condom, or using petroleum jelly as a lubricant are all ways to decrease the effectiveness of condoms at preventing pregnancy.
Lubricate: Although a quick shave can be done with just warm water and softened skin, using a shaving foam or lubricant will ensure better results and a slicker glide.
In addition to the material, keep the zipper in tip-top shape by treating it with a zipper lubricant, which keeps the mechanism free of debris and extends its life.
After the skin has dried, the patient should apply a skin lubricant to seal moisture in the skin and create a barrier against further dryness or irritation.
Whale-oil is principally used in oiling wools for combing, in batching flax and other vegetable fibres, in currying and chamois leather-making, and as a lubricant for machinery.
Petroleum has very long been known as a source of light and heat, while the use of crude oil for the treatment of wounds and cutaneous affections, and as a lubricant, was even more general and led to the raw material being an article of commerce at a still earlier date.
Petroleum has largely superseded other oils, and is still gaining ground, as a lubricant for machinery and railway rolling-stock, either alone or in admixture with fixed oils.
Micaceous iron ore consists of delicate steel-grey scales of specular haematite, unctuous to the touch, used as a lubricant and also as a pigment.
Large quantities of ground mica are used in the manufacture of wall-paper, and to produce a frosted effect on toys, stage scenery, &c. Powdered mica is also used in the manufacture of paints and paper, as a lubricant, and as an absorbent of nitro-glycerine and disinfectants.