If you think your rationale for having sex with with a bud on the side is sound, have you presented the same argument to your wife as you have to us yet? If not, why?
To me, one of the things that distinguishes a committed intimate relationship is the potential for 100% transparency between both parties. You are cheating. i think you are missing out. You need/want something you are not getting in your marriage, but don't feel safe enough to discuss it with your partner. i think that's pretty common (not cheating, hiding), almost traditional lol. i don't think it's unusual for long term partnered folk to keep thoughts and feelings from their partners.
Before i was married (i was 19), i stood up in church one day and 'confessed' i am attracted to men. i was conditioned by my religion to believe i was "broken" and having sex with a guy would be sinning against "God." I'd prayed and tried to change for 5 years without success, so i "confessed" thinking i needed help. LMAO, no one knew what to do, so they circled around me and prayed... no one brought it up after that. i sure didn't, it took all my courage to bring it up in the first place. my wife to be was present in that meeting.
Two years later, a few weeks after we were married, i opened up to my wife and told her i still "struggled' with being attracted to men. i was extremely naive, but sincerely religious and believed she'd be my helper in my fight against "same sex attraction." Eek, lol, she freaked out (of course), and i realized again that i was alone with this... just me and "God." i learned thirty years later when we were separating that she had gone to our pastor and asked if she should get an annulment. They discussed me and decided i was just confused, but know one spoke to me about it. That was the religious culture i was part of at the time, not really unusual then.
Five years into my marriage, i drove down to a port in LA to help refurbish a missionary hospital ship one weekend. One of the missionaries, "Skip," came on to me that night in our shared berth and i had my first male to male sexual encounter. It was a wordless sex act in the dark. The next morning i wanted to talk about it... i was in love lol. sigh. He had left before i woke and hid from me till i had to leave. When i got home, i told my wife that i am gay and that i wasn't going to change and we needed to separate. i didn't tell her i had cheated, rationalizing what was the point, we were parting. i moved from the west coast to the east. Another guy picked me up a few weeks later while walking on the beach and we spent a week together, i learned a lot about sex with guys. i started falling for him, and he got tired of me about the same time.
my experience was not scientific, but i was guilty and ashamed and still captive to many of the false notions i had about being gay and "God," etc.. i missed my wife and started talking to her again. i told myself that i didn't want 'the gay lifestyle' and convinced her to get back with me. Again, i didn't tell her i had cheated, sincerely believing it was out of my system. "It" wasn't. i got into a pattern of cheating where quick anonymous sex became the only affirmation i had for that part of me (which i didn't understand at the time). i was ashamed and hated myself for cheating and lying. i often cried, begging "God" for help every time i was on my way to cheat, and every time after cheating. It was a tortured existence filled with self loathing.
At one point my wife got sick and i was convinced i had given her AID's. i went to our pastor and told him everything and he told me to tell her too. i did. She "needed" to know everything, and i mean "everything." She insisted i tell her every detail of what i had done, drive her to all the places i had cheated and describe everything. She insisted she needed to know in order to "heal." Who was i to argue? i went through "reparative therapy." i was a wasteland, i had devastated someone i loved... which became especially clear when i told the truth. i was still convinced that being gay is a sickness and sin, so i thought finally i'd have the 'help' to change that i needed.
Of course, it didn't work. i didn't change. It took a lot of processing on my own to understand that my, and the people i loved, ideas about "God" and being gay were... wrong. It was pretty amazing. Once i accepted who i am and went to my wife and told her: "i'm attracted to guys, and that's not going to change," the compulsion (not desire) to have sex with guys left.
my wife wanted to stay together only if i would admit i was "broken" and "repent." i couldn't help her understand that i'd been doing that for most of my life to no avail, and to do so would be a lie. my family doesn't get it, they are still religious and think i am willfully rebellious. i get it, i thought the same thing for most of my life, and i'm the one who's gay.
i reached a point where i would sooner lose everything then lie or cheat again. Wow, freedom and peace. i did lose everything, material, my family... but i got sanity and reality. That's worth it. If you cheat and lie, your life is an illusion.