I have to wonder if it would turn on my wife to see me suck off another man. Often I jack off on her pussy and lick her clean telling her I wish the cum was from another man. Now when I ask her if she wants me to cum in her mouth or on her pussy and eat her clean she always picks on her pussy...
Lately I do this to my wife and then I lick her clean with us imagining it is another man's cum. Maybe someday it will be cum from someone other than me, I hope.
I also tell my wife she has the ok to fuck other men and I also hope she has but it is frustrating to not know for sure because she never admitted to it.