Here is a small (not at all complete) list of female celebrities who have been cheated on:
Halle Berry
Eva Longoria
Sandra Bullock
Jennifer Aniston
Sienna Miller
Elizabeth Hurley
Shania Twain
Christie Brinkley
Reese Witherspoon
Denise Richards
Katy Perry
Jennifer Garner
What would you say if one of these women came to you and told you they are having feelings of sexual worthlessness due to their partner's affair?
Do you really think any of them got cheated on because they are no fun in bed?
Cheaters don't cheat because there is something sexually wrong with their partners. Cheaters cheat because there is something wrong with THEM.
My WH told his AP I was "too skinny." I am 5'2 and weigh 115 pounds. Also that I don't give enough oral, etc. (sorry for TMI)
All this tormented me for a long time and I wasted way too long feeling insecure because my WH was a broken, shitty person.
I started getting over it when I realized: the AP was an insecure, obese woman. My WH was using me, his loving wife, as a pick-up prop. He was playing on HER insecurities about HER body, to make her feel like the thing she was insecure about (her weight) was actually the thing that made him want her. And he did this at my expense.
He did this because he had chosen to become a very, very ugly person. I never stopped being beautiful, or desirable, or deserving of a partner who wanted only me. Once this really sunk in, I had my worth back, and it was no longer anyone else's to rob me of.
At that point, it became his job, if he wanted any chance at R, not to prove to me not that I was beautiful, etc. (because I already knew that), but that I was not WASTING MY LIFE with someone who would prefer me to be anything other than exactly what I am, physically and sexually. I can say that he has done that, every day. This isn't why I am no longer insecure, it's just why I'm still here.
So my advice is this:
1) When sexually worthlessness arises, TURN IT AROUND. Your wife's A was not about YOUR lack of worth, but HERS. Think about the worth she sacrificed to do what she did. AP too. They did the moral equivalent of smearing shit all over themselves. What they did wasn't sexy. It was gross.
2) When jealousy arises, remember that what your WW offered AP was the WORST, GROSSEST, LEAST ATTRACTIVE part of herself. The dregs and offal of her personality. She made him her dirty little secret. She gave him a liar and a cheat. He did the same for her. You are so much better than that. There is nothing there for you to be jealous of.
3) To the vast majority of women, there is nothing sexier in a man than devotion and fidelity. There have been so many threads here about women who have lost physical/sexual attraction to their WH's after the A. Because what they were attracted to in the first place was not the objective physicality of their H, but the belief that he was a good, loving, loyal man. Without that, whatever good looks or prowess in bed might remain, it is like an empty skin. NOT sexy.
3) Understand that there are many women who would look at you and see THEIR version of "perfect," physically and sexually. You DESERVE to spend the rest of your life with one of THOSE women, and not waste your time with someone who cannot see you in that way. If your wife is one of those people, you will need her to prove it to you (if R is on the table). If not, she is not WORTH YOUR TIME. This is how you need to re-frame your thinking.
YOU ARE THE PRIZE.