Why is it that men have such little clue?
So you want to show your wife porn you have been watching featuring some random woman? How do you think that is going to go down? You have just admitted to her that you are watching porn without her, that raises all sorts of questions for an average married woman, such as…
Is he watching porn because I’m not enough for him?
What other disgusting things has he seen that he expects from me?
Does he hope that convincing me to ...... with someone else so he hopes he can do the same?
Porn is so degrading, do I want to be with someone that has a porn habit?
But whatever she thinks it is unlikely to be positive. It would be far better to talk to her like the adult she is about how you would like to ask her about trying new things with the sexual side of your relationship. You have to approach it carefully and build up to it, just like when you first met her. I take it you didn’t walk up to her in the street and say, hey you look hot, would you like to come with me and we can fuck?
Of course you didn’t, you took baby steps, getting to know each other a bit and despite at least one of you wishing you could jump straight to getting naked, some time was spent getting there. Things are no different now, to get to where you want to be, you have to work your way there, that means taking the time to carefully think about what you are going to say and move faster when things are going well, slow down or even stop if she rejects your suggestions.
If you can’t even have an open discussion about what celebrities you both find attractive and could imagine having sex with, without the feelings of distrust and jealousy raising their ugly head then you are not ready to talk about actually having sex with real people.