Ok, technically, there’s no such thing as completely safe sex.  Even if one partner in a heterosexual couple gets a vasectomy, they can still get pregnant. (Seriously.  It happened to my parents.)  No method of birth control is 100% effective, and user error impacts the efficacy of contraceptives (like having sex before you’ve fully recovered from your vasectomy), meaning that the advertised efficacy of birth controls will likely decrease in actual use.  And unless you and your partner have never had any sort of sexual encounter ever ever ever, you’re not immune to STIs.  The good news is, even if the steps you took to prevent getting pregnant or contracting an STI fail, there are still healthy options for you.

Pregnancy Planning and Prevention