To those who are confused on withdrawal being a form of birth control.....
When speaking of birth control, we are speaking about more than devices, drugs, or contraceptives in general.
Birth control, per wikipedia..
Birth control is a regimen of one or more actions, devices, sexual practices, or medications followed in order to deliberately prevent or reduce the likelihood of pregnancy or childbirth.
That being said, withdrawal is OBVIOUSLY not a form of contraceptive.. however, it is a sexual practice meant to prevent and/or reduce the chances of pregnancy. Therefore it is technically considered birth control.
And when used correctly, the statistics of becoming pregnant.. while definetly not as reliable as birth control.. aren't too terrible high, for not using any drugs or device.
Of every 100 women whose partners use withdrawal, 4 will become pregnant each year if they always do it correctly.
Forms of BIRTH CONTROL (remember, b/c is not limited to contraceptives) according to Planned Parenthood. (and many other links I wont bore you with.)
Morning After Pill
Fertility Awareness Method (also known as natural family planning)
Sterilization for women