In many aspects of your life, you're an adult but don't feel like one. There are times you wonder if you missed the day when they were handing out manuals to being a grown up, considering you can barely even do your own laundry. However, when it comes to relationships, you realize you've grown with each one. I mean, just think back to how you approached dating before you had sex. Things were a lot different back then. Maybe even simpler? Here are a few key differences.