The withdrawal method has been practiced for centuries and is always convenient and available. All it involves is the man attempting to withdraw his penis before he ejaculates.
Control over ejaculation is not very easy and the withdrawal method is known to be the least effective form of birth control. For the average couple, the withdrawal method is at best only 82% effective. This is due to the fact that some men find it difficult to control the point of ejaculation and accidentally release sperm into the vagina. Accidents like these are particularly pervasive in younger men with little sexual experience. Failures can also occur because the clear liquid discharged from the Cowper’s gland before ejaculation is rich with sperm cells. Since it is difficult to tell if this pre-ejaculate is leaking out of the penis, the withdrawal method is deceptively unsafe.
Before ejaculating, remove the penis from the vagina.
The withdrawal method depends on one thing ... removal of the penis from the vagina before ejaculation. If a man neglects to do this then this method will undoubtedly fail. Secondly, there is no way for a man to restrict the flow of Cowper’s fluid from his penis, and thus no assurance the method will work. Furthermore, if a woman doubts the man's ability to withdraw his penis in time, she will not be relaxed and able to enjoy the sexual experience. This is not a highly recommended form of birth control and should not be practiced unless it is absolutely the only method available and the risk of pregnancy would not be considered a disaster.
It offers no protection from STDs.