A few days ago u/igorexus54 made a comment in r/skunkgirlempire looking for advice on how to get started making captions. When I reached out offering advice they hit me with a list of questions, some of which were fairly straightforward but others really got me thinking about not just caption making but the creative writing process as a whole and required a more complex answer. I thought our q&a could prove insightful to others and hopefully it inspires a few more people to explore any interest they may have in creative writing. So with their blessing I'm gonna post the questions they gave me, followed by the response I put together.

What do you use for making captions? 

What do you base your story on? (The loom of characters? Their expressions? Their farts?)

What is a good balance between farts and story?

How long should be captions?

Where do you find images to make captions of?

What makes a caption good?

And most importantly how do write the sounds of farts depending on the fart?! Like when do you use pfffrrrttt when bbbffrrrt and when "pffssssss*

I'll do my best to answer these questions  for you but some of these are really more about finding your own personal style which will develop as you make things and form opinions on the process.

So let's start with your question that I see as having the least solid or necessarily quantifiable answer: what makes a caption good? That is entirely dependent on how you define good in a particular context. Is it good if it becomes popular? Is it good because you think it conveys the story you're trying to tell in a way people resonate with? Is it good because it solidifies and allows you to let go of a fantasy that's been stuck in your head? In simple terms who is your intended audience  and what are you trying to tell them? A good mindset to have would be to keep those questions in mind and to judge how good a work is based on how well it succeeds at delivering the intended message to the intended audience.

As for how to strike a good balance between eroticism and narrative, that's something that will need to be learned over time through both producing your own works and by forming opinions based on other's works, and adjusting yourself to the contextual needs of the project. The biggest general advice i can offer here is to keep in mind that a good narrative can still be effective and successful even if the sex scenes are short and lackluster; but a big, gaudy, overwritten sex scene can overwhelm and ruin an otherwise good story. Think of sex scenes like salt in food, you want enough to enhance the narrative but going overboard will be disastrous.

"What to base one's caption on" is something that can. E approached a number of ways. Maybe you find an illustration that inspires a story, or evokes emotions that a story can be derived from. Maybe you have an idea for a scenario in mind and you go looking for pictures to base your characters around. Or you find a depiction of a scenario and you decide to flesh out the characters and context. Overall it's really just something to take on a project by project basis.

To the question of sfx (sound effects eg: ppfffbbbrrrttt) when making fart erotica; in my case it does not emphasize the aspects of a fart that I am drawn to. Those sound effects should be thought of as just that a way of conveying the phonetic details of how a fart sounds; therefore an easy way to write those is to conjure the fart you are intending to convey in your mind and really focus on each and every little crackle, micro sputter, hiss, ect and to write that out phonetically.  That said I would suggest examining and explaining all of a fart in a similar manner to convey a much more vivid picture. We've covered the noise, but what about the temperature? The humidity? Is it wet? Does it loosen and blow bits of dried unwiped shit? And that's not even getting into the ocean of ways one can convey scent through words; is it sour? Earthy? Bitter? Spicy? Is it a more peppery spice or a more oniony/horseradish kind of spice? To what extent does it clear your sinuses or make your eyes water, does it leave you choking or gagging? It's a good idea to consider all of these kinds of factors and to pick out which ones are important to your target audience. 

As a matter of length I would say as a general philosophy  it's best to find a balance of the most effective way to convey the message you would like to get across with enough detail to clear and vibrant without feeling over encumbered or bloated and Once again something you will figure out as you develop your style. For creating captions specifically it is vital that a proper balance is struck so that the text and illustration are in some degree of equilibrium, or else one or the other will be overshadowed and potentially detract from the other instead of complimenting it. Hitting this balance is the big challenge with captions since it tends to be dictated by the size of your canvas and the formatting your want to go with; which gets into typesetting and image editing which i'm not great  at myself; keep in mind how much text you can work with and how that text interacts with the illustration if you format as a block of text grafted onto the edge of your illustration vs something like speech bubbles or otherwise setting the text on the image itself. a personal preference I would suggest that beyond around 1000 words you are probably better off just writing a story and maybe linking to the relevant pic if there even is one at that point.

As for where to get pics to use, that can be anywhere online. It's a good idea to make sure you know your sources and you should reach out to artists for permission, but I'm not the cops, your dad, or your conscience and I don't have room to judge on that kind of thing. The big practical advice is mostly that its a good idea to always try to find the highest resolution, most original version of an image you would like to use as that will give you the most room to work when you get into typesetting (but keep in mind how that will interact with font size and how readable the final product will be, especially think about this in terms of readability) and the least compression errors to get in the way of any edit you may need to make.

Now, finally how to bring it all together for a caption. There are really 3 major processes necessary to produce a "finished" caption: you need to find your image, which we went over; you need to figure out the story you want to tell and how you want to tell it; if your going with a format that puts text alongside an image i would highly suggest writing the entire scene in advance so you just need to figure out how to best edit it all together; and finally there is the image editing and typesetting, which again is mostly style and you will learn which ways work best for you by trying new things. For the purposes of any subreddit I run, I wouldn't have a problem if your caption was you uploading the pic and then pasting the text into a comment; hell in a lot of cases i wish caption makers would just do something like that as it is an extremely utilitarian, accessible, and readable way to assemble a caption. Another method i have favored lately is stating in google docs (which is a free word processor and is the best i've used) with a blank page; pasting the image i want to use, centered at the top of the page; and writing out my story below it without needing extra programs; to finish this method you just need to screenshot the whole document and crop it to what you need. If however you are looking for fancier and more complex options your best bet is to hit up google and YouTube and searching for caption tutorials; there are a bunch of small blog posts and little known videos out there that do take a bit of digging to find but can offer a ton of ideas that you can choose to utilize in your own works