One of the interesting phenomena of our time is that young people want to experiment to ensure that the sex will be great before they get married to anyone. This has increased the incidence of promiscuity. The truth is that as wonderful as great sex is, it does not guarantee a great marriage. Who will give you hotter sex than the prostitute? But I doubt that any sane person will consider a harlot for a spouse. You can have mediocre sex and a great marriage. You can have super sex and a poor marriage. Of course, it would be great to have both and there is a chance. The reality is that whatever quality of sex you have in a great marriage is great. Just make up your mind whether you want a sex partner or a marriage partner. There is a great difference between those two.