I think that since you spend so much time at work, you bond w/your co-workers. At my job, we hang out alot off hours. I've gone on vacation w/them more than once. The difference being, I'm friends w/the guys. I suppose it depends on the people in question, what their morals are.
EA happened when WH and OW were both together on sabbatical at another university in a different country. So long hours together and me completely out of the picture.
I had an RA with the W of an associate. Hooked up at a corporate retreat, with a wink and a nod from her H. We weren't the only ones.
My best friend's WW is a nurse. Another is in real estate.
I'm here because of two coworkers whose flagrant EA (suspected PA) triggered wicked PTSD attacks and flashbacks from our A season over 30 years ago.
Work is the land of opportunity. Recent statistics show that wives who work are unfaithful at pretty much the same rate as husbands that work. The stats for the stay-at-homes are better, it's just that more women have that lifestyle, so their overall A-rate looks a little better.
Now, I refuse to date anyone in one of these fields.