One day you may realize an important life lesson: while your life experiences shape your views on the world and make you the woman you are, the world is not a 1 size fits all model. What is right for you may not be right for the next person. You were lucky enough to find a man who loves you for being you. Good for you. Not everyone is so fortunate.
Monogamy is one of your valued core principles. I think it is a bit much to come on this board to chastize married men about their choices to partake in this 'hobby'.
The simple fact is that your relationship will have a better chance of survival the quicker you move away from this world. What seems all encompassing now - how you met, your involvement working as SP and these incessant flame wars are going to define you until you learn to simply walk away and address your issues that are screaming for attention (father issues, self loathing for being an SP, etc ...). But it is much easier to preach/fix everyone else than look inwards isn't it?
WG