Quote from Murasaki;949506:
My signature shows less than a lingerie catalog. I feel like if I added a bikini string it would suddenly be okay, but why? Her leg is already covering what needs to be covered. I cropped it pretty carefully, making sure I didn't even show the bottom of her beasts, or her butt. I don't know what people think but if it's something like this I'll always consider how it may affect others.
I'm not that person, but I'll explain why I felt the need to bring your sigi up.
It's because of how suggestive it is. It doesn't matter if there's no full frontal, and it doesn't matter if there's no other explicit content. But you cropped your picture so that it's focused right on her pubic area. Cropped as it is, it looks less like a piece of art and more like smut. You could argue that a lingerie catalog would show more (since the breasts are apparent), however, a lingerie catalog is often made with the intent of showing women what they would look like wearing lingerie.
Your sigi, on the other hand, has no context. The average user will assume it's smut, and to everyone who doesn't know you're an artist, it will be nothing but a suggestive piece of pornography. That's ultimately what it comes down to. Something can be suggestive without being explicit. Also, to be fair, some people may consider the mons pubis explicit - and there are very few catalogs of lingerie (certainly none that are freely given out) where you would be able to see that much of a woman's pubic region. If you added a bikini, it could be a woman in the beach. Naked like that, it's a woman post/mid/pre-coitus (to most people.)
Add to that the hand (is she caressing herself? is she posing? Why are her legs positioned that way?) and your picture becomes open to many, many different interpretations, most of them having nothing to do with the fact that it's just a piece of art you're proud of.
Also, don't forget that the term "pornography" is somewhat relative. Porn is something that sexually stimulates someone - and to many men, your signature is sexually stimulating. Like it or not, for those men it is "downright porn." You put this picture on the internet, if someone hasn't done so already, someone will end up "stimulating themselves" to your art.
I didn't want to bring any of this up simply because you've already gotten it approved, and like I said in my previous post, there are some things which you simply can do nothing about.
P.S. Also, even if it you did it because you're an artist, you're basically linking to porn by linking to your tumblr. Personally, I think your original sketch is actually a beautiful piece of art, but it is sexual content and that's something you simply can't deny or rationalize away. Sorry for bringing that up as well, but it's part of another issue that I had with Mabination (I don't think it's okay for people to be linking to sexually explicit content.)
P.P.S Sorry if it seems that I'm criticizing you or your art - I'm really not. But nudity in art brings up many, many touchy subjects and issues, particularly when you have to factor in who your audience is, on top of the sociocultural issues.