Similarly, unusually low levels of testosterone can decrease sexual fantasies and diminish desire. We humans have the priviledge of being a species who can, theoretically, continue to experience different stages of sexual arousal, such as, excitement and orgasm, indefinitely. The trick is to learn to accept and adjust to changes rather than giving up on sex altogether because it's different than it was when we were younger. I'm feeling a little tired. Send ten of them home.
Good sex has a lot to do with stamina, flexibility and blood flow.
And if you want choice in lovemaking positions and want to be physically spontaneous and intense at times, you will probably need to practice a variety of exercise styles. For instance, yoga for flexibility, weight training for strength, and aerobics for stamina. One recent study showed that a good workout on an exercise bike increased sexual interest in women more than a candlelit dinner. The more blood flow to your genitals, the healthier they will be and more you will feel. But your biceps and thighs aren't the only muscles in your body that need continued exercise and attention for good sex.