The male condom is the most preferred method of contraception for young people. It is very effective to prevent the risk of pregnancy and sexually transmitted diseases. It is the only method that has this dual role. It is reliable, when used correctly. The female condom has the same advantages as the male condom.
Step 1. Do not hesitate to buy a pack of condoms. Pharmacy staff are usually very supportive and serious about it and they will give you any kind of advice if you have any doubts. Act naturally. Having sex is something that every adult does. Check the expiration date. Do not use condoms with defective packaging. Transport them in the package and do not carry them in your pocket.
Step 2. Open the package carefully as the condom can be damaged in the process. Be careful with fingernails and any sharp objects (rings, etc.).
Step 3. Before putting on the condom, pull back the foreskin. Unroll the condom a bit to find the right side. Before putting on, tighten or squeeze the tip of the condom so that no air is at the end of it (this may cause breakage). Leave space at the top.
Step 4. Roll the condom down to the base of the penis. With an erect penis, push the condom down before unrolling to avoid touching or damaging the tip. Some people apply some specific water-based lubricants or creams to the penis (careful with some as oils, petroleum jelly or shaving lotions that can damage the condom ...) so that it goes on easier. This also allows it to fit better and reduces the possibility of breakage. If you use oil-based lubricants you should use polyurethane condoms, which are a little more expensive.
Step 5. Using a condom. Check occasionally that the condom is in place. If it slips or is torn during sex you should pull out, wash yourself off, and replace it with another condom.
Step 6. Double condom. Some people try to use two condoms at once, thinking that two condoms double protection. Do not do that. The two condoms rub against each other and friction will increase the likelihood of breakage. For the same reason, a male condom and a female one should not be used at the same time.
Step 7: Once done. Pull out of your partner while the penis is still erect so that the semen does not spill out of the condom. Remove the condom, wrap it in a tissue to throw it away. You must not flush it down the toilet. Of course, you need to use a new condom every time you have sex. Never use the same condom twice.
For more information visit:
Family planning / contraception
http://www.who.int/mediacentre/factsheets/fs351/en/
Expanding access to contraception
http://www.who.int/reproductivehealth/topics/family_planning/mec5th-edition/en/
Birth Control
http://www.plannedparenthood.org/learn/birth-control
Adolescent pregnancy
http://www.who.int/mediacentre/factsheets/fs364/en/
Digestive 
Blood
Cardiovascular
Dermatology
Genitourinary,
Hormones
Infections
Oncology and
Musculo-skeletal
Mental health and
Parasites
Respiratory
Senses
Various
