Office romance just doesn't carry the same stigma it did a generation ago.
The 'office spouses' can be more open with each other than they can with their own spouses, and there's no guilt involved.
It's a wonderful support system among workers, and makes a more productive worker.
Don't ever send an e-mail. You can never really tell the tone in an e-mail. It's always best just to use a personal approach.
They have a big attraction -- there are no strings attached, and if doesn't work out, you go pick out another office 'spouse,' and no divorce is necessary.
Most employers don't want to reach into the private lives of employees. Smart employers want to cover themselves against troubling behavior. They don't want to create a big brother situation.