I have quite a few regular clients who openly admit to being married. They say would never ever leave their wives and still love their wives dearly. They consider their wives to be their best friends still and still do the couples thing eg. out for meals etc but no longer have a sexual relationship or the ones that do have a very limited one for a variety of reasons.
The ones that are open about being married consider it a much better option to seen me that to have an affair based on the fact there is no emotional attachment and much less complicated in general. As one of them explained he has less chance of his wife finding out anything untoward is going on and as I don't contact him(or anyone else for that matter) at all unless he has contacted me within the last 30 mins and I won't be demanding he spends Xmas with me either!
One particular gent was diagnosed with cancer which involved the removal of his testicals he is still able to get and maintain an erection and also able to cum. He has regular injections (every 6 weeks) to give him a libido as without these he simply stopped looking at women in a sexual way and no longer felt like a man. His sex life stopped after his op and himself and his wife have never discussed or had any sexual relationship since then. He thinks that she either thinks he can't anymore or has a fear of hurting him in some way. I have asked why they have never spoke and he said things are OK as they are now, so no point really. As I said earlier he still loves his wife dearly and his attitude is that he pays for the bit that's missing from his marriage but he and her are perfectly happy with the rest of their marriage. So seeing me is basically adapting the situation within his marriage and filling a void in an otherwise perfectly happy marriage so who could argue or judge that in a negative way?
Another client who also was ill for a long time and was unable to continue a sexual relationship with his wife encourage her to go meet someone else to fulfill her sexual needs which she did after long discussions obviously. They continue to live together (they have a few kids together) she continues to see this man for sex with his blessing. Although he is now recovered they never got their sex life back on track (maybe due to her seeing the other guy who knows) but she also knows, and is OK that he see WG's. Both parties openly are aware that the other is getting sex elsewhere but they both are discreet about it and maintain the illusion of marriage to the outside world and their children. This may not work for some people but it works for them and that's all that matters, in my opinion I actually think its rather sweet.
. Again another example of working at a marriage that suits them and not necessarily what is consider the norm but not ended up with a messy divorce and kids being seen by Dad on a Sunday. So in answer to Matium there is YES