I feel the opposite is true for me; junk food amplifies lust. Once I become lousy in one respect of life, I feel it's acceptable or it won't hurt if I become lousy in another respect. If I eat dirty, the rest of my life becomes dirty. Sinning, laziness, low standards, etc. are a slippery slope that ruins all aspects of your life. Once you clean up your act in one aspect, you'll feel obligated to maintain that standard throughout.
Can you post the picture?