I feel like that sometimes too, Prince. My first real girlfriend, she knew she was my first sexual partner. She would ask me (a lot) if I would ever get bored with her, if I would ever wonder what things were like with other women, with different experiences. Of course, when your first girlfriend, who you are madly in love with in every way, asks you if you'll ever get bored, we all know what the answer is to that. The truth is at the time I wasn't curious as to what it would be like with other people.
After things ended badly between us (basically, her wondering what sex was like with other people, and acting upon that curiosity) I have begun to give more thought to 'life experience'. I have wondered what life would be like if I was to be unattached.
But I can see the differences between your situation and mine. You clearly have no doubts about your feelings for your wife.
WarWagon's advice about talking to your wife is great. I wouldn't recommond holding out and waiting for her to initiate sex to feel satisifed. After all, she might not think about it and you could wait a long time, and that'd make you feel worse. If she's happy "getting laid" once a week then nobody has the right to ask her to 'put out' more often. She won't be enthusiastic, you'll sense it, it won't be fun. I know that's not what anyone's suggesting, but I'm also thinking as I type, so bear with me
Instead of asking for more of the same, I think the trick is to ask for some 'spice'
If she only wants it once a week, then it's that one night per week that has to count. That's the night that has to be drawn out, with no distractions, and without the goal being to climax.
I guess if I was married (and my dreams for marriage are a bit rose-tinted) I would rather have my wife do all those things for me than some checkout chick.
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I've just read over this and I'm a little unsure if it makes sense, but it's 2.57am. I hope I've managed to say something