A guy could simply tap a girls shoulder and she almost automatically assesses her attraction to whoever that guy may be and decides if she will act on it. There could have been no previous attraction and now suddenly there's lots. There's a lot of power behind touch. We fickle teenagers are very vulnerable to touch, it can change our mood, our relationship status, our outlook on life. Touch had a laaaaarge influence on us and I'm not just saying that. I speak with experience.
We go from person to person claiming that we have an eternal love for them and believing that nothing could ever separate us, then something happens, we separate and feel the same way about another person. Now that phrase, that state of mind loses it's meaning, it's intensity.
It never ceases to amaze me what breaks my own relationships off as well as the relationships of my friends and aquaintences. You go from being so "madly in love" with someone to never speaking to them because they tell you something they are struggling with that they are coming to you for support through and it causes you to lose attraction. Or they say something that makes you angry and you decide it's not going to work out.
These things are all such dumb reasons to end a relationship and I've fallen captive to them and I hate it but you know why? It's because it is young love. If you really loved a person those things wouldn't bother you quite so much. You would love them just the same and you would be there through thick and thin because you love 
that person.
If you can change your mind that easily about someone you "love", do you really love them?
