Sex in marriages are special for it is significant of not only the physical intimacy shared by the couple but the entire experience of coming to together, from falling in love to marriage.
It has been discovered by Italian scientists that the biochemical state of falling in love is similar to obsessive compulsive disorder. The yearning of couples to be together and learn about each other in intimate detail is overwhelming. They tend to grab every opportunity to show affection and get as close as possible to one another. During this period sex can be very exciting.
The difference is that sex is more mutual when we've fallen in love. In marriages, sex is more than mere physical intimacy. It's about giving and sharing ourselves physically and emotionally. As well as sexual satisfaction, we can expect to feel emotional fulfilment.
Sex in a relationship after love has its own set of positives such as gaining knowledge about the opposite partner. It also helps develop a mutual sense of trust between the partners. Individuals feel more open to try different means to spice up their sexual desires. This would not be possible if the distances are not narrowed between them which could happen only when they trust each other!
When a relationship matures, sex matures. You now have the advantage of knowing each other well. Fear of rejection is replaced with trust and security. This allows you to move into a stage of experimentation and mutual growth. You can take the time to fine-tune your skills as a lover.