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diewinelle wrote:

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and i don't care what the 'expert' here's saying about pre-cum, i personally had 3 friends in high school and college who got very pregnant relying on the old 'pulling out' form of birth control. it's russian roulette.

Your friends were probably not pulling out every time on-time. You can look up studies on the effectiveness of the 'pull-out method' but here is a snippet from wikipedia on the subject:

Observed failure rates of withdrawal [while using the pull-out method] vary depending on the population being studied: studies have found actual failure rates of 15-28% per year.^[2] In comparison the pill has an actual use failure rate of 2-8%,^[3] while the IUD has an actual use failure rate of 0.8%.^[4] The condom has an actual use failure rate of 10-18%.^[2] (see Comparison of birth control methods)

For couples that use withdrawal correctly at every act of intercourse, the failure rate is 4% per year. In comparison the pill has a perfect-use failure rate of 0.3%, and the IUD has a perfect-use failure rate of 0.6%. The condom has a perfect-use failure rate of 2%.^[4]

The primary cause of failure of the withdrawal method is the lack of self-control of those using it. Poor timing of the withdrawal can result in semen on the vulva, which can easily migrate into the female reproductive tract. Some medical professionals view withdrawal as an ineffective method of birth control.^[5] In contrast, a recent study in Iran found that provinces with higher rates of withdrawal use do not have higher fertility rates, and that the contribution of withdrawal use to unintended pregnancies is not markedly different from that of other commonly used methods such as the pill or condom.^[6]

It has been suggested that the pre-ejaculate ("Cowper's fluid") emitted by the penis prior to ejaculation contains spermatozoa (sperm cells), which can easily pass into the upper female genital tract in the presence of cervical mucus.^[7] However, several small studies^[8][9] have failed to find any viable sperm in the fluid. While no large conclusive studies have been done, it is now believed the primary cause of method (correct-use) failure is the pre-ejaculate fluid picking up sperm from a previous ejaculation.^[10] For this reason, it is recommended that users of withdrawal have the male partner urinate between ejaculations, to clear the urethra of sperm, and wash any ejaculate from objects that might come near the woman's vulva (e.g. hands and penis).^[11]