Illustrations showing how to put on a<unk>  Male<unk> s are usually packaged inside a foil or plastic wrapper, in a rolled-up form, and are designed to be applied to the tip of the penis and then unrolled over the erect penis. It is important that some space be left in the tip of the<unk>  so that semen has a place to collect; otherwise it may be forced out of the base of the device. Most<unk> s have a teat end for this purpose. After use, it is recommended the<unk>  be wrapped in tissue or tied in a knot, then disposed of in a trash receptacle.<unk> s are used to reduce the likelihood of pregnancy during intercourse and to reduce the likelihood of contracting sexually-transmitted infections (STIs).<unk> s are also used during fellatio to reduce the likelihood of contracting STIs. Some couples find that putting on a<unk>  interrupts sex, although others incorporate<unk>  application as part of their foreplay. Some men and women find the physical barrier of a<unk>  dulls sensation. Advantages of dulled sensation can include prolonged erection and delayed ejaculation; disadvantages might include a loss of some sexual excitement. Advocates of<unk>  use also cite their advantages of being inexpensive, easy to use, and having few side effects. Adult film industry In 2012 proponents gathered 372,000 voter signatures through a citizens' initiative in Los Angeles County to put Measure B on the 2012 ballot. As a result, Measure B, a law requiring the use of<unk> s in the production of pornographic films, was passed. This requirement has received much criticism and is said by some to be counter-productive, merely forcing companies that make pornographic films to relocate to other places without this requirement. Producers claim that<unk>  use depresses sales. Sex education<unk> s are often used in sex education programs, because they have the capability to reduce the chances of pregnancy and the spread of some sexually transmitted diseases when used correctly. A recent American Psychological Association (APA) press release supported the inclusion of information about<unk> s in sex education, saying "comprehensive sexuality education programs ... discuss the appropriate use of<unk> s", and "promote<unk>  use for those who are sexually active." In the United States, teaching about<unk> s in public schools is opposed by some religious organizations. Planned Parenthood, which advocates family planning and sex education, argues that no studies have shown abstinence-only programs to result in delayed intercourse, and cites surveys showing that 76% of American parents want their children to receive comprehensive sexuality education including<unk>  use. Infertility treatment Common procedures in infertility treatment such as semen analysis and intrauterine insemination (IUI) require collection of semen samples. These are most commonly obtained through masturbation, but an alternative to masturbation is use of a special collection<unk>  to collect semen during sexual intercourse. Collection<unk> s are made from silicone or polyurethane, as latex is somewhat harmful to sperm. Some men prefer collection<unk> s to masturbation, and some religions prohibit masturbation entirely. Also, compared with samples obtained from masturbation, semen samples from collection<unk> s have higher total sperm counts, sperm motility, and percentage of sperm with normal morphology. For this reason, they are believed to give more accurate results when used for semen analysis, and to improve the chances of pregnancy when used in procedures such as intracervical or intrauterine insemination. Adherents of religions that prohibit contraception, such as Catholicism, may use collection<unk> s with holes pricked in them. For fertility treatments, a collection<unk>  may be used to collect semen during sexual intercourse where the semen is provided by the woman's partner. Private sperm donors may also use a collection<unk>  to obtain samples through masturbation or by sexual intercourse with a partner and will transfer the ejaculate from the collection<unk>  to a specially designed container. The sperm is transported in such containers, in the case of a donor, to a recipient woman to be used for insemination, and in the case of a woman's partner, to a fertility clinic for processing and use. However, transportation may reduce the fecundity of the sperm. Collection<unk> s may also be used where semen is produced at a sperm bank or fertility clinic.<unk>  therapy is sometimes prescribed to infertile couples when the female has high levels of antisperm antibodies. The theory is that preventing exposure to her partner's semen will lower her level of antisperm antibodies, and thus increase her chances of pregnancy when<unk>  therapy is discontinued. However,<unk>  therapy has not been shown to increase subsequent pregnancy rates. Other uses<unk> s excel as multipurpose containers and barriers because they are waterproof, elastic, durable, and (for military and espionage uses) will not arouse suspicion if found. Ongoing military utilization began during World War II, and includes covering the muzzles of rifle barrels to prevent fouling, the waterproofing of firing assemblies in underwater demolitions, and storage of corrosive materials and garrotes by paramilitary agencies.<unk> s have also been used to smuggle alcohol, cocaine, heroin, and other drugs across borders and into prisons by filling the<unk>  with drugs, tying it in a knot and then either swallowing it or inserting it into the rectum. These methods are very dangerous and potentially lethal; if the<unk>  breaks, the drugs inside become absorbed into the bloodstream and can cause an overdose. Medically,<unk> s can be used to cover endovaginal ultrasound probes, or in field chest needle decompressions they can be used to make a one-way valve.<unk> s have also been used to protect scientific samples from the environment, and to waterproof microphones for underwater recording.
Condom
Vaginal syringe
Vaginal ring
Macy catheter
Dental dam
Word catheter
Hot water bottle
Antimonial cup