Every married man "wants" to sleep with other women. If you're a man, that is how you're wired genetically and nothing will change it. I remember reading some scientist's theory that after a man bangs a woman, he'll only find her attractive for about four more years on average...then he'll start thinking of moving on to the next conquest.
But the temptation to do it and actually following through on it are two very different things. Having been married for a couple months now, I still look at other women and appreciate their beauty by thinking to myself "Wow, she's hot as fuck." It's impossible not to. But I'd never attempt do anything about it even if I knew I could get away with it...because I'd bet the lives of my entire family that my wife would never in a million years do that to me. I'd feel like the world's biggest prick if I devastated her like that all because I couldn't follow through on a promise I made.