You are right GG that men are less embarassed by the infidelity, but...
Men want to be protectors and providers... It's instinctive.. primal.
The major bullet that MEN get hit with isn't that they are having sex with another woman.. they don't find that embarassing...
Men get embarassed when they are exposed as NOT protecting their wife, as actually HURTING their wife instead. Men further get embarassed when tehy aer criticized for abaondoning their spouse emotinally, physically, and financially... THIS stuff humiliates a man.
Yes, there are deadbeats out there who do this and don't care, but most men find this embarassing, men pride themselves on sexual activity.. they BRAG about that in high school..
But, hurting a woman, leaving her financially destitute, and vulnerable.... THAT part they don't like .. it makes them look like scum rather than manly... and it feels horrible to be humiliated at that level.
You focus on him abaondining you, not on him having an affair with HER.. focus your exposure on him walking OUT on YOU, on him LEAVING YOU ALONE after you gave him twenty - two years of your life.. and now he's hiding like a coward in a cabin you two used to share together.