Maybe you should have sown some wild oats before you married.

What you get out of sex is what you get out of sex; is not what your partner gets out of sex or what you get out of masturbating. It's your body and presumably it will behave with another woman as it has behaved with this one, leaving most of the rest of the equation in your head.

I'm reminded of learning to kiss? Remember when you kissed someone for the first time and went on to the next one, etc. until you found someone that you enjoyed kissing and being kissed by? Sex is kind of like that and what are you going to do if you, having gotten a bit of experience with your wife, choose someone younger and more naive than you and really enjoy teaching her or really enjoy that she is more curious or braver and more interested in your wife and will let you try X or fulfill Y fantasy? You can't put the genie back in the bottle; you can't go back to kissing someone whose kiss you liked "okay" when you find someone whose kisses feel better.

That's why it is suggested that we not get a real heavy duty masturbation thing going before we have partners or instead of partners, etc. because you get to liking and being use to your own hand and can't get use to working with a partner. Women (and men) are not interchangeable sex objects; it's not just a matter of either choosing the "best" kisser for you or the one who listens to how your day went and is a good cook. When you try to compartmentalize relationships, separate the physical from the mental, from the emotional, you get into heap big trouble.

We are all trying to become whole human beings and treating another like it's okay to take them in pieces (your wife's saying it's okay for you to sexually explore outside the marriage as well as your thinking about whether to give it a try) doesn't just affect one person, despite what one may think/say/feel. That's why polygamy is a bad idea, it spreads the male too thin; yeah it's possible to have a sex with multiple women, animals do it all the time, but it's not possible to have a whole-person relationship with multiple people; humans can only do things one-on-one. You don't see stallions going out and bringing food home to all their "wives" or trying to emotionally bond with them while doing the dinner dishes together. They just have sex and "protect" their wives from other, younger, more virile stallions. Male lions and such will kill another lion's young cubs if they are able to take over the pride.

Going with "nature" instead of trying to circumvent it usually goes better. Yes, men generally want more sex; you got to keep those expensive/time-intensive children coming for the continuation of the species but nowadays, we use our society to curb our instincts and work for quality instead of just quantity. Where's the quality in giving in to instinct and having random sex because it feels good? I did that with eating food and now I've got weight and health problems