Why is it that withdrawal actually works that well then, when people say it's not a form of birth control at all? To understand why it works, you need to know all about the male reproductive system.
Sperm is produced in the testicles. When a man orgasms, millions of sperm shoot out from the epidydymis (where sperm has been stored and matured for 13-14 days) through the ductus deferens (aka vas deferens) to the prostate gland, the seminal vesicle and the bulbourethral gland, to finally shoot out from the urethra and out of the penis. The makeup of seminal fluid (the fluid that is produced to aid sperm) comes from the prostate gland, the seminal vesicle and the bulbourethral gland.
The worry with withdrawal that many have is pre-ejaculate, because they argue that despite the fact that many men may be able to withdraw before ejaculation occurs, pre-ejaculate has already come into contact with the vagina and suddenly there's a risk of pregnancy. This does not make sense from an anatomical perspective. The only place where sperm is produced is in the testicles, nowhere else. Pre-ejaculate is mainly produced by the bulbourethral gland, with the glands of Littre contributing a little (mucus-secreting urethral glands). Through studying the male reproductive system, you can see that the bulbourethral gland and the urethral gland (glands of Littre) is nowhere near the testicles and has no interaction with them in producing pre-ejaculate. The only way for pre-ejaculate to contain sperm is through contamination. Contamination from a previous ejaculation where remnants of the sperm that shot out is lingering in the urethral tract and mixes with the pre-ejaculate, which will ultimately be smeared inside of the vaginal walls during intercourse. This residual sperm may well be alive. That's why proper use of withdrawal entails peeing after each ejaculation to clear the urethral tract and flushing any residual sperm out. Aside from the physical force of peeing that is a flushing action, pee is also acidic where as sperm is alkaline. The acidity kills the sperm.
Knowing why perfectly performed withdrawal at all times is 96% effective is not enough. You need to be sure you can always withdraw in time. I would recommend the practice of edging (solo) before even thinking about trying this. I would also recommend the use of back-up birth control for a while until you know for sure that you got this. In fact, if 96% is not safe enough for you, I wouldn't recommend that you stop using back-up birth control at all. Just keep using withdrawal with whatever you are using, it's safer to use two compatible methods at once than just one method if you use the methods right. The takeaway is this... Yes, withdrawal is a viable option of birth control but you still need to be careful about using it.
Some very important factors to do withdrawal right:
- Pee after each ejaculation
- Withdraw prior to ejaculation, not during or after
- Don't ejaculate anywhere near the vagina, ejaculating on the ass for example is very risky because it's too close to the vaginal opening. I would recommend to aim for the stomach or the back if the woman is laying down horizontally. There is no drip-risk while laying horizontally and ejaculating that far away from the vagina and vaginal entrance. Just make sure it's far away, even if that's directly in a towel or wherever you do it.
- Don't put the penis back in even for a split second after ejaculating, keep the penis away!
- Practice with back-up birth control and don't rely on it as your sole method of birth control in the future if after practicing, you still cannot consistently succeed withdrawing in time.
- Rinse the head of the penis and the corona after ejaculation. Be extra thorough if the penis is intact. This is not part of the practice included for perfect use of withdrawal (peeing is, for example), but I strongly believe that this might further reduce the risk since you would be washing away residual sperm that possibly was neglible to the eye.
- Wash your hands (male and female) if you plan on touching each other's genitals after intercourse, or if that's something you usually do, even just in a "platonic" way. You do not want a hand being contaminated and then touching the vulva, vagina or vaginal entrance as that would be risky.
My last final note... I purposely did not include any links backing up my claims. You know why? Because you need to do your own damn research before believing in anything you hear someone say. Just like I wouldn't recommend that you listen to those who say withdrawal doesn't work, I wouldn't recommend that you trust me blindly either. It's a principle thing.