I remember when I was seventeen, I tried on some new ideas. One of my ideas was that notions of "right" and "wrong" were false creations of society, and did not actually exist. Yeah, it didn't make much sense back then, either.
What's safer sex? Find out how you can best reduce your risks of STIs and protect your health and how to do it and be supported in it without feeling like the Sex Decency Brigade or bringing on the buzzkill.
Whether you are with a new partner, or are already in a sexual relationship, getting a full STD/STI screening can give you peace of mind and ensure your physical well-being as well as your partners.
If you have NOT gladly and freely consented to and participated in sexual activity -- if you have not in some way said a big yes and wanted to keep saying a big yes -- and someone else had sex with you anyway, that is rape. No matter what ANYONE tells you, it is not your fault. There certainly is fault, but it lies with the rapist, not the victim.