Testosterone is the ONLY known aphrodisiac, so if you want to change your desire, you have to change your testosterone level.
Okay, I know I am the Nth person responding to this little pearl of Cemar's, but Cemar, I am wondering where you got this gem, because I have been on this board too long to know that you didn't make it up. But it's misinformation.
There are several supplements out there that have an aphrodisiac effect; in fact, ImLin just posted about DHEA on my thread. And forget about the "medicinal" route...doesn't the right scent, food, word, fantasy, etc have an arousal effect for a given individual?
Cemar, my testosterone driven friend, I hope you get a chance to look some of this up for us and yourself...you might discover a creative, though perhaps more subtle, desire-enhancing fix that's intriguing. And, if you had more intimacy with your wife, you may even take note of some of her fav scents and such and surprise her. What fun that would be!