What you are looking for is an aphrodisiac and this is something that is more of a myth than anything else. The world over, different cultures have always been looking for ways of increasing fertility and libido in both men and women and to this effect there have been quite a few exotic and odd treatments from consuming animal genitals to exercises. At the end of the day, these have scientifically been proven to be hogwash. It is important to understand what constitutes libido in both men and women.
Libido is something that is dictated by psychological conditioning and by the play of hormones. This is the reason why we don’t all feel aroused with the same stimuli but the mechanism of arousal is still the same. The hormones that cause an increase in libido in both men and women are androgens, specifically testosterone. Testosterone is created in the testes of men and ovaries of women. In men, there is more testosterone secreted than in women and it causes the appearance of male characteristics. In women, testosterone has only one use and that is to regulate the feeling of desire. To the question of what can increase the amount of testosterone in the body, there is also a subunit of testosterone that has to be taken into account called dihydrotestosterone or DHT. DHT is much more potent and free testosterone in the blood is converted into DHT. Now, this means that increasing testosterone production is the key. The only way you can do this is to take anabolic steroids or naturally with exercise. Taking steroids will have a dramatic effect on your behavior and once you get off them, your natural testosterone levels will be altered dramatically to the point where you could develop female characteristics.
In terms of exercise, you should indulge in rigorous weight training and not cardiovascular exercise only. The latter is a precursor the former but you should focus more in the former. As you start you regime, the testosterone secretion will start to slowly increase and this will be evident in the amount of muscle mass that you start to put on. It is also important that you try and exercise the psychological aspect of the libido by starting to explore parts of your fantasies and perhaps even seek some counseling from an expert on the subject. The key is to explore aspects of your sexuality that will get your libido going on its own steam.