Pull out just as effective what? I learned in biology that pre-ejacutlion fluid contains sperm and not to metion some men can't don't have enough control to "pull out" in time, and of course does not prevent STDs. South Korea has one of the smallest birthrates in the wolrd, I'm pretty sure that they don't get that by using the "pull out method"
The pull out method is as effective as condoms. There have been studies on it. You shouldn't be worried about STDs if you're in a committed, monogamous relationship though.
Pulling Out Is as Effective as Using Condoms
Studies show that pulling out is as effective as condom use. Why do we still consider it irresponsible and lazy?
www.vice.com
The birthrate in South Korea is less about birth control and more about the fact that people in almost every country are more reluctant to enter parenthood because of global economic issues.