Somehow there's a cameltoe even when nobody is wearing it.

1. Why is this on Danbooru?
2. Why do I feel compelled to translate it?
3. Why are there so many subordinate clauses that I can't sort it out into a coherent sentence?

Paraphrasing because I'm inadequate. It's a classic design that flows from the neckline to the hem. Yes, it has the same appearance as a school swimsuit, because swimsuits are built on the Princess Line pattern. They also say something about its silhouette that I can't make out, and maybe some other things. It's a very dense sentence.

One of these days someone is going to call me out on my Japanese vocabulary. "Cock, pussy, cream pie, sperm, dress pattern, O-face, wait, what's the word for jacket again?"

It's not a single sentence, it's three: the first three lines, the next two lines, and the final four lines. The first two sentences don't have any explicit verbs or terminal punctuation, but those aren't qualities that should surprise you about any given Japanese sentence.

TubercularOx said:
One of these days someone is going to call me out on my Japanese vocabulary. "Cock, pussy, cream pie, sperm, dress pattern, O-face, wait, what's the word for jacket again?"

If you ever come up with a good answer there, be sure to let me know.

Hnh. Looks like my ability to look up words in a dictionary failed at several points in that thing. No wonder I was confused.