For once the rom-com movies have got it right – the rest of your relationship all rests on the success of your first kiss. At least, this is true in terms of your physical relationship. The first kiss signals to you how you both work together on a physical level. If your teeth clash or your mouths work on alternate rhythms then you know that your sex is going to be awkward and a tad messy. If the kiss makes you feel as if your insides have turned to liquid or if it makes you want to jump on this guy and rip off his shirt – even though you’re both currently in a very swanky restaurant – then you are guaranteed to have a passionate night you will never, ever forget.