@maxdancona,
'If the person you have been with for 20 years no longer satisfies you, which do you think is better; divorce or infidelity?'
This actually puts everything I was looking for in one sentence, however I am still wondering what is in men's head when they are all of a sudden flying off their 'husband' handle?
When it is not just a one night stay to get it out of the system, but actual second family. And then they are back to their wives?