Was making a translation (not bl related) and came upon this definition for "trade". I did not know that. But i do know a lot of examples. And i bet you guys do too. I've found the name for them, in the middle of my job... Did everyone else knew about
![which hole first? [F][23][oc]](https://www.nude-pics.org/gallery-2/which-hole-first-f23oc-KclUAeyB7t/which-hole-first-f23oc-thumb.webp)
