Well, the greatest chemistry and sex I had in my life was with someone dishonest and unfatihful, a true diagnosed nypho (no joke). She was so good in bed—that every man that ever slept with her would call her and chase her, but never wanted to marry her (they too saw the flaws as being too much to live with). So, in the end, I thought that if I focused too much on the act of sex / passion / etc..I would miss having a friend as much as having a sex partner. The balance is so difficult, but no doubt important. Also, how many times have your heard that it starts great and dwindles over time? Show me a HOT women and I’ll show you a man that is tired of fucking her after 10 years. In the end, I beleive, its all in the KISS combined with good COMMUNICATION. Great Sex will always dwindle over time—its what is left over that will determine if you last. If you can find a friend who is very compatible and you both enjoy kissing each other and talking to each other about EVERYTHING, the rest should be easy. You adjust and you work together to keep the spice alive. Otherwise, like every other person in American, you get divorced thinking the grass is greener on the other side—only to find out 5 years from now, you are back in the same boat, just with a different person. Yes Chemistry is important but do not misinterpret early normal excitement (the newness of it all) as the main ingredient to a lasting relationship. Date for 2 years minimum before you get married. Make sure you love to kiss. Make sure you are able to say you are sorry when you make a mistake. Make sure you equally are able to say you are forgiven when the other apologizes. Make sure you never speak disrespectfully to one another. Make sure the person you married talks positively about his or her parents. Make sure you have a common beleif system / values. And trust me, IF you have those things going for you SEX will come natural. All too often, we think “SEX” (aka Chemistry) has to be #1 or nothing. Making SEX #1 will in fact make you overlook many important traits in a lasting life long partnership. We will all die one day—that is a fact—lets not spend too much time worrying about how good our orgasims are or should be. Peace.