I'm jumping on the bandwagon...suffering from me2ism. I agree with Faverody, as well.
Men and women often use the excuse of sexual dissatisfaction as a reason to have an affair. If you are in a committed relationship then you should sleep in your own bedroom. I have been committed before (lol) once or twice and if I started to get to the point where I was thinking sexually about another person...I packed my stuff and hauled hinny out of there. In my mind's eye...that is a sign that its over.
So, I stand on my soapbox and say "nay, adultery is not right, regardless of the situation a person says they are in."