I wish this section was called "Advice" or "Encouragement" rather than "How to". "How to" seems a little more emphatic than what I want to say. Still, I feel like putting in my two cents worth.
I was a long-time reader of Literotica before I dared attempt writing a story myself. It was only once my dissatisfaction with what I had read prompted me to give it a try that I finally sat down and began to type. I was conceited enough to think I could write as good a story, or better, as those I had read. My confidence soon gave way to humility and frustration as I discovered that writing involved more than turning my dirty thoughts into words. Over time, and several attempts, I eventually began to learn that there were several key ingredients to making a story believable and erotic. What I'm attempting to do here is elaborate on some of these and maybe help fellow authors to become better authors, and encourage those who are still too shy to submit their attempts to do so. Here is what I think matters -- feel free to disagree:
DIALOGUE
Read it, again and again if you must -- then aloud once more. Do you speak like that? Do the people you know speak like that? If the answer is "No" then re-write until it
sounds
believable -- literally.
TEMPO
People sometimes meet and within an hour they are having sex. This happens, but it's not the norm -- especially in situations that are taboo for one reason for another: gay, lesbian, interracial, and incestuous encounters -- not to mention non-human, I reckon. I could perhaps add trysts where one partner is married, or is unaccustomed to kinks like BD/SM, or is reluctant/resistant. Prolonging the seduction, and the ultimate culmination, not only makes the story more believable, but it also increases the excitement for the reader and makes the release more intense.
DESCRIPTION
"He squeezed her breast." Did he squeeze her left breast or her right one? Did it feel firm or like a rotten tomato? Was he unable to fit all of it within his hand or pinch it easily between his fingers? Details help the reader to envision in his or her mind what you are describing. This in turn heightens their arousal and adds to their enjoyment of your story. It's better to give too many details than not enough, I think. Are his eyes brown or blue? Is she under or over six feet tall? These descriptions ultimately matter to the reader. When s/he grabbed his cock was it hard, thick, hot, long, short, twitching, or did it feel like a cold carrot? We need to know these things.