One night stands, booty calls, random sex: When is it time to leave?

Okay so I am a psych major so I automatically start to think about things from a psych point of view. During your intro to psych class or social psych class you will learn about "scripts". We all operate under "scripts" prescriptions of how to act in certain situations. For example, and perhaps the most famous example, if I ask you what happens when you go to restaurant the vast majority of people will probably say something like:

Go in and be seated
Get a menu and order
Eat
Pay the bill
Leave

One of the most intersesting facts I remember hearing in psych class was that when there is a fire in a restaurant or in a building with a restaurant, most of the people who die or are injured is due to there in ability to vary from this script. Instead of running from the building in a panic, people stop to pay the bill. Well, we have scripts that we learn and that practiced over and over again. However, a script that is not well defined but should be has to do with the one night stand or booty calls. This somewhat common occurance has a different script to every individual and what you are supposed to do is a great big unknown. My biggest question is how do you get someone to leave once you are done. I mean if I go to a guys house, I am out the door once I am done... which is odd because I would expect them to be even more so that way. However, the ones I have run across like to cuddle afterward. confused? I know I am. I understand that with this kind of behavior alcohol and late hours are usually involved, so people are tired and I am all about a couple hours of sleep, but to me, just leave or be able to leave shortly after we are done and don't wake me up. Just call me tomorrow or next week. Too much time together and talking will only complicate things. Just keep it simple, keep it at just sex....

Fall into me: Why can't someone tell me this?

FALL INTO ME

"Right here waiting, staying strong
Come and Fall into me

You say you've turned it off
Hid your heart upon a shelf
Scared of what it might cost
To take it down for someone else

Cause loving him you lost
Too much of yourself
Baby can't you see....that he's not me
And...

I need you to know you can fall into me
That my arms are wide open and will always be
Right here waiting,
Staying strong
Come and fall into me

I'll follow any road
Anywhere to get to you
I'll open up my soul
If that's what you need me to do

But now baby its your move
All you've got to do
Is believe in love, just believe in us
Now...

I need you to know you can fall into me
That my arms are wide open and will always be
Right here waiting,
Staying strong
Come and fall into me

Just believe in love, just believe in us
Baby...
I need you to know you can fall into me
That my arms are wide open and will always be
Right here waiting,
Staying strong

Come and fall into me
Come and fall into me
Baby fall into me" --Emerson Drive

Dazed and confused: What are the rules about Ex's?

Okay I have a question. What are the rules when dealing with and ex? I mean a real EX. An ex from years ago. Are you allowed to ever hook up again? What if you never really hooked up? What if it feels unfinished because you never go the opportunity to go that far? Do you take the risk of ruining what you have now to make sure it is finished and that your feelings for that person are really only in the past? Or is it grabbing at air, and trying to hold on to something that isn't there? Is it okay to hook up with an old ex to get over new one? Well, I guess I can only wait and see what happens. Being on the rebound is confusing. :-)