Oh god, lots of clueless people here.
Pulling out is a very unreliable form of birth control, even if you do it without fail. Basically you've gotten lucky so far, so have fun when you're all of a sudden a dad.
And you can get diseases just going in, it makes no difference if you cum or not? Who the fuck is teaching people this shit? God damn.
The best proven forms of birth control are either a condom (for your one nighters), or better yet some sort of the pill (pills, shot, etc.) for someone you're with for a while. Condoms break. And the morning after pill is only around 90% effective.
Yes, I do take myself as a mini-expert on this shit now, after going through it all with seemingly hundreds of fucking doctors.
-Phil