Dinner and Relationship Danger

Just had dinner with some friends with crazy conversations and it has all sorts of questions running around my head.

When do you intervene in an enagement?
Can you tell a friend that there boy/girl friend is wrong for them?
Is flirting okay if you are married?
If you are far apart is it OK to have sex outside the relationship? I mean we all ahve needs.
When do you move?
Do you ask someone to move with you?
How often in one day canyou have sex?
Dr, Oz fromOprah says atleast 300 orgasms a year.

I was thinking about my past and going through the bad relationship things that i did. Here is a sampling from stages in my life. In high school I messed around with my best friend's girlfriend. She was hot and I was 17. I know it was wrong but at that age i didnt care. In college I had the nice girlfriend and then some randoms on the side. She was sweet but I wanted more. When I first got to DC I ditched the awesome girl blew up a great thing for a girl i had a crush on. This was a perfectly fine relationship ended for the prospect of sex with a crush, fucking idiot. During my internship, I also broke up a relationship, realized I wasnt into her and ditched.

I honeslty think we have all done these things. I thinks these actions are more or less societal norms and that bums me out. We were grilling a friend about getting married too soon and didnt she want to have sex with more people. i mean she is happy and wants to get married and we are pressuring her to do the opposite. At first I thought it was funny and then it was like...wow we are being dicks.