Rituals can also have special and personal sentimental significance. If your partner gave you a beautiful bouquet of red roses on your first date, you may create a ritual in which you spread rose petals out around your sacred sex area before a romantic evening.
A ritual can be as simple as lighting your partner's favorite scent of candles for your traditional Saturday night rendezvous. Or it could even be booking “your” table at your favorite romantic restaurant.
Or maybe your ritual will be something a bit racier, like taking turns performing striptease dances for each other. Some couples like to watch a movie (be it a romantic film or an X-rated flick) as a ritual to get them in the mood for sex.
If you are the creative types, you could take turns writing poems and reading them to each other, or singing a song you wrote especially for your partner.
The ritual itself is not as important as the thought behind it, and the fact that you have created this special event together, something you find mutually exciting that you can share on special occasions.
You probably would not want to engage in the same ritual every time you make love, or the novelty will wear off quickly and things will get boring. On the other hand, a familiar ritual can sometimes be comforting, making you feel more at ease.