You choose, not anyone else. In both cases, sex and contraception are Undiscussable because they have been squeezed into predetermined packages by societal mores. This is baloney. Now, on these pages, we seek to rip away the facade of Undiscussability and talk about contraception and sex in the way that we want to, the way that makes sense to us . Knowledge is power.
Information is hope for the future.
Women need and deserve both. Nothing is simultaneously easy, cheap, spontaneous, and nonthreatening to your health. You and your partner will have to compromise. Learn as much as you can, and try to talk with people who have used each method. Please read this even if you have already had sex.