Maybe you're super excited to try anal and you want to get right in there — don't. It's always best to start slowly with a new sexual experience, but is especially important when you're trying anal sex because the sphincter muscles in an anus are tightly closed. So, instead of jumping in with a penis or sex toy, have your partner stick one (lubed up!) finger inside your rectum first. Then, slowly add more fingers until you're ready to move on to penetration with a penis or with a strap-on.
If you’ve had unprotected anal sex and are worried about possible HIV infection, go and see your healthcare professional straight away. You may be able to take post-exposure prophylaxis (PEP) to prevent HIV infection, but it has to be taken within 72 hours to be effective. However, PEP is not a replacement for condoms and isn’t available everywhere.
Spreading STIs. Infections and diseases that are shared during sexual intercourse — such as HIV, gonorrhea, chlamydia, and herpes — can be shared through anal sex. In fact, anal sex is the sexual behavior for transmitting and getting HIV for both men and women. People on the receiving end (or “the bottom”) of anal sex are more likely to become infected with HIV than the inserting partner (or “the top”).