Well they might be pregnant with your child and both you and them can have every STI there is. Go and have yourself checked out right now. And always, always wear a condom. Both for yours and their sake.
By being absolutely certain that your partner has not got any STDs. If you cannot be certain of that, then there is no way you can be sure you won't contract a disease if you have unprotected sex.
ask her if she's ovulating or not, if she's not then you could have sex with her.----------Unless you're ready to become a father, you should seriously consider keeping that condom on. Other than the...
Yes, as long as you completely trust your partner and know their sexual history. Remember, when you have sex with someone, you are not just sleeping with them, but everyone they have slept with. So,...