When does sexy e-mailing with old flame get too much?

[MinkyWhale]

A VERY long time ago, over 20 years, I ended a five year relationship. So we were young, gone through college together, he had then been sent to work in Australia. We actually split up when I had gone to stay with him, things were ropey and I fell hook line etc for someone else. He was devastated. I left him v quickly, moved back home and married. End of.
My marriage ended 5 years ago, I have one child and other casual relationships. Nothing serious.
Out the blue, he has got in touch by e-mail (he was moving jobs and going through old addresses apparently); he's married. This started last month and is now fast and furious and highly explicit in terms of general chat and memories. Today was very specific about one sexual encounter.
The simple fact is we will not be meeting given the distance. I have no ties, he does - do I just let it play out (it may lose novelty value soon...) or is it my obligation to worry about his morals?

Really what did you expect posting that here in the Relationships topic.
Do you read the threads on here from women who have found out their husbands are 'sexting' or emailing other women?
Surely if you have an ounce of decency you would a) steer well clear of this guy and b) not post on here justifying what you are doing.
I think its sad that you have so little self respect that you are allowing yourself to be such easy wank-fodder for a sleazy married man. He could get the same thing from a sex chat line but then he'd have to pay for it, whereas he is getting it free from you. You must be so proud!

OK, so you would like to continue the correspondence minus the sexual content?
Have you told him you would like to change the nature of your emails?

I am not really sure quite what your question is?

You ask what your responsibility is for his morals and I think the answer is none.
But you ignore your own morals. I am not sure you would be concerned about his but not concerned about your own which is why I am not sure I understand. Isn't that a bit like going shoplifting with a friend but wondering if you should stop because of your responsibility for her morals. You shouldn't be shoplifting.

Having an intimate relationship with a married man is dodgy by most standards of morality. The fact that the relationship is not and will not be physical is not the point. You are inserting yourself in an intimate way between another couples relationship.
That is shitty and you should stop.

What are you hoping to get out of your email communications with this man?
I'm not sure what sort of advice you are looking for.

I'm also confused when you describe yourself as having no ties when you have a child. Do you just mean that you have no partner at the moment?