It's not sex that's at issue with me, in "Nobody Farts." It's the intentional avoidance of reality. Farts happen, as do wet spots, sudden muscle cramps, and discovering unfortunate patches of acne/hair/moles/birthmarks/regrettable tattoos/etc. I'm sure we all could think of situations where any of those things could be used in a sexual scene to build character, charm and amuse the reader, or deliberately derail the scene to create tension.
And if you're mentally cringing... why?
Let me step back a moment. It's not for me to tell anybody how to go about their writing. I'm sure my bias is pretty obvious to anyone who follows this blog -- I take both physical and emotional realism very seriously. I strive to include those awkward details and situations because they're true and they can be just as important to the story as anything else.
Do I throw in awkward details just for the hell of it? No. Everything has its place and every place has something.
I was influenced, in this, by John Gardner's book The Art of Fiction -- about which I will write a post for the A to Z challenge in April, so I will only mention it briefly here. In the back of the book are a list of exercises which range from challenging to massively intimidating, and the one that came to my mind immediately upon reading the "Nobody Farts" post was #24:
Without an instant's lapse of taste, describe a person (a) going to the bathroom, (b) vomiting, (c) murdering a child.
Confession: I haven't written that exercise. When I first read it (as a teen), merely thinking about it was enough to rip my horizons open rather painfully. Twenty-mumble years later, I don't doubt that I could do all three of those if (a) it's what the character did and (b) the reader needed to see it in order to understand the story.
There are big questions there about Art and What Art Means To The Artist as well as The Viewer... and again, it's not my place to tell anybody those things about their own art. I can only speak for myself. I only hope to get your brain burbling about it.
And I would not hesitate to inflict farts, wet spots, or bacne on my characters -- they knew what they signed on for. The horny little buggers deserve it, practically.
Funny how quickly one can go from "farts" to "what does it all MEAN???" isn't it. :)
See also my musings on the "why" of erotica in general.