Erotic is what I like, vulgar is what everyone else likes.

Erotic is the art of leaving doors slightly ajar. Enough to make the mind lean in and do its own private vulgarities. A fog, darkness, mystery, and tantalizing reward. It’s a half-sentence that somehow feels like a full romance story, written in ink that smudges on purpose so you have to interpret it.

Vulgar is when the same door gets kicked off its hinges and someone starts pointing at everything inside with a flashlight and commentary track. Nothing is hidden, nothing is paced, nothing is spared from narration. Media slaps face.

Generally speaking, I think it has to do with intent:

Erotic = intended to arouse / is sexual in nature.

Vulgar = intended to offend / is characterized by a lack of social acceptability.

OK, so, no word of a lie, I decided to enumerate an alphabetical word list of British English. "erotic" is at 30872, and "vulgar" is at 99680. The average of these is 65276, which is where you'd draw a line exactly between them. What word is at that entry? "package's".

So by sheer mathematics, you're crossing the line if you can see some guy's package. QED.

my dick being hard or soft.

Erotic = It turns me on.

Vulgar = it offends me.

Also both of those are moving targets.

Erotic is light sensual play with a feather.
Vulgar/perverted would be if the chicken is still attached

I reject the premise of vulgarity

I dunno, but "Erotic is where you use a feather, kinky is using the whole chicken, perverse is serving it to your mother in law for Sunday lunch the next day"

Erotic is sophisticated, thoughtful, sexy. Vulgar is trying to be erotic and failing because it's lazy, derivative, and misses the nuance.

I can't describe it, but I know it when I see it.

It's not so much a line as transition zone.

Erotic is when you search for the details, vulgar is when they are pushed into your face.

Where do you draw the line between green and salty? There isn't a line between them, they're two different dimensions.

Well, if it's in Latin it can be erotic, but never vulgar.

If it turns me on or disgusts me.

There's a line, a very moist line that you don't want to cross you naughty girl/boy/puppy.

Erotic: brownie\
Vulgar: pot brownie

I don't... or at least I try not to.

"Sex-positivity" means acknowledging and accepting the wide variety of tastes and consensual adult activities that make up human sexuality. And to do that, you have to understand that your own preferences are subjective and arbitrary, and that just because you aren't into something doesn't make it gross, obscene, vulgar or worthy of judgement.

No vomit or shitting or anything like that.

Erotic is a tasteful, slow motion pan across long, smooth legs, leading up to a sexy ass.

Vulgar is the ass then turning towards the camera and goatse-ing everyone, before pumping out a thick runnel of shit for over a minute, before someone comes in with a small model toy car, and drops it into the distended anus, so it can drive down into the large intestine. And then labelling the video 'Herbie Goes Spelunking!'

Erotic is when everyone involved in the scene is in full consent of all the actions happening. Vulgar is the moment one person decides that they are no longer comfortable with the actions happening yet the scene continues anyway.

Erotic is when the fellas form an orderly line and wait their turn. Vulgar is when she has a "Now Serving: #42" screen above the bed.

Why exactly would anyone want to draw this line? "Erotic" and "vulgar" are both bad looks at a funeral, you know?

Erotic is when everyone involved is into it. It turns vulgar when one person isnt.

Erotic: sexually arousing or intended for such purpose.

I don't think vulgarity is a well defined or even useful concept. It's just another remnant of Puritanism.