Let's face it: Getting busy is lots of fun for most people, but many people make mistakes and take risks that they may not have considered before taking their partners to bed. Here, we'll reveal five of the most dangerous sex mistakes you might be making without even knowing it. First, it should go without saying that two potential sex partners should disclose their sexually transmitted disease status, plus any risk factors they might have, such as intravenous drug use. Sure, it's not proper pillow talk, but it's very important to know and share your status before having sex. Safe sex goes hand-in-hand with this conversation, and despite having the best intentions, some couples use condoms improperly.