Think back to the good old days and it'd be easy for us to see that our ancient "cavemen" ancestors would never have any problem of "getting it up." Heart disease was not even "invented" back then.
Without artificial "processed" foods, and with such high-protein diets they were all eating, their testosterone levels were always at their natural high. Their naturally available "High protein, Low carb" diets were mainly accountable for the production of sex hormone which was always in plentiful amount to keep them going – day and night, that is.
Red Meat: I believe beef and lamb are the best "real" nutritious foods. The protein composition in these foods is considered almost close to complete, which is also a good source of Creatine, which makes us stronger and energetic. Red meat also contains a great amount of the nutrient coQ10, which not only is vital for heart health, but also essential for sexual health because judging from the strong connection between erectile dysfunction and heart disease, it goes without saying that coQ10 will play important role in sexual health as well.
Wild Fish: Yes, fish can be one of the main food sources that contain mercury and other toxins and you should by all means refrain from eating too much of them, yet when you choose wild Alaskan Salmon, Mackerel, Trout, or Sardines, over farm-raised fish, you'd be taking in a lot of good omega-3s and benefit as a result. And this mega-doses of omega-3s are also of utmost importance to the health-conscious too.
Eggs: Eggs are the ultimate and perfect food. Everyday I eat an average of 5 to 6 whole eggs in spite of the rumor about eggs containing way overly too much cholesterol. The developing embryo needs this cholesterol to create sex hormones, and so do men. And they do help with male sexual stamina. Therefore, please rest assured that eating too many eggs will not get you into the hospital, but helps you claim back your manhood instead.
Dairy: Dairy can be best described as "liquid meat" because it contains much good protein. However, raw and organic milk is best when compared with other processed ones. Cheese and whole milk are wonderful sources of calcium and vitamin D. Male sexual stamina level can be greatly enhanced with good supply of these nutrients too.
Nuts: Rich in healthful monounsaturated fat, nuts are another good source of protein too. Almonds and walnuts are full of nutritious Omega-3 fatty acids, vitamin E, fiber, potassium, plus many other minerals. Other good choices are pecans, macadamias, cashews, and brazil nuts. They are whole lot better choices than chips and crackers when it comes to snacks. Doing so will help to improve male sexual stamina level too.
Other factors like excessive drinking and smoking also bear much influences on both male sexual stamina and male sexual performance as well. A few too much drinks will make a man useless, and so does smoking too excessively. A solid erection requires flexible blood vessels that are easy to expand. Smoking will tighten up the blood vessels, making them to narrow to channel the right amount of blood needed for an erection to take place.