Nutrients for sexual problems:
Certain foods may also be useful in improving certain symptoms of sexual dysfunction such as premature ejaculation and impotence:

Premature ejaculation – Recent studies have shown that the higher the blood histamine level, the quicker the ejaculation.Calcium and the amino acid Methionine lower blood histamine and may therefore be helpful.

Impotence - Impotence in men has often been linked with deficiencies in trace minerals such as Magnesium, or in particular, Zinc. Zinc is vitally important to the male reproductive system; it is required for production of testosterone and proper functioning of the prostate gland

In addition, men who have difficulty achieving or maintaining an erection may want to eat foods that are rich in L-arginine.This amino acid, found in protein foods such as chicken, beef and turkey, contributes to the production of nitric oxide, which controls blood flow for penile erection. However, a note of caution: foods that contain high levels of L-arginine are NOT recommended for anyone who has the herpes virus, as these foods have been shown to hasten an outbreak of herpes.

Foods to avoid:
Needless to say, there are also some nutrients that are counterproductive to a good love life, such as excessive alcohol and caffeine, which constrict blood vessels and impair circulation vital for sexual functioning. And other factors, such as nicotine from cigarette smoking and the use of certain medications may also impede sexual performance.

As far as your diet, stay away from sugar, food additives, preservatives and processed food.This means no chocolate, soft drinks, candy, coffee, frozen dinners, NutraSweet, dougnuts, pastries, and generally anything that you know isn’t good for you!