Romantic letter writing is often difficult for us to write romantic love letters our closest loved ones. Are you trying to boost the passion in your relationship? Only romantic messages can pump up that intimacy. Keep reading -- we polled 100 of the top experts in the field, and asked them to share their secrets on how to write those top notch romantic love letters. And surprisingly, it's a lot easier than you might think!

The number one piece of advice that sex experts give, when writing a romantic letter, is to be yourself. Tell your loved one how you really feel in your own words. Don't try to be someone you are not and don't use sappy words that aren't your own. Your spouse fell in love with you and you are the one they really want to hear from.

Be specific : most experts polled stressed that people learning to write romantic love letters to focus on familiar specific things when writing. Don't be vague, say what you mean and what you feel and what you want. Be specific in the details.

Be passionate: many people have trouble truly expressing their passion for another human being. One prominent sex expert explains it this way: "most of us are trained to be repressed. We are so scared to show our true, burning, passion, because it is not accepted in our society." When writing a romantic letter, it is time to banish all repression, shame, and fear.

Be erotic: Roses, chocolates and teddy bears are boring, even passe as far as expressing true love is concerned. True, passionate love can be one of the most beautiful things between two human beings. So, don't hold back when you write romantic love letters - try to get into your deepest and most passionate thoughts and express yourself unabashedly.

Include if you can in your envelope an item or two signifying passion, romance and happy times together. Perhaps a lipstick kiss, rose petals, a fragrance, a photograph of a special occasion together, or a heart-shaped candy will remind your loved one of romantic memories, inspire ideas, and spark passion.