Infidelity was considered horrendous when only men did it, or mostly men. Now that more and more women want to do it, it's not considered to be so bad. So goes morality and a conscience.
In my life I’ve seen more woman cheating than men. Personally there is no excuse for this behavior. If you want out of a marriage get out. Divorce will probably be much easier, including being easier on the children if there are any.
I’d like to find a woman to live the rest of my life with, but it seems the negatives far outweigh the positives. Plus with retirement in the next decade or two I have to start circling my wagons, I can’t 1/2 everything again. Hopefully I find one that will make this a better deal.