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
![my first bone gag, what do y'all think [oc] [f]](https://www.nude-pics.org/gallery-2/my-first-bone-gag-what-do-yall-think-oc-f-lHvK9pMqgJ/my-first-bone-gag-what-do-yall-think-oc-f-thumb.webp)
