I don't hear you

Hello. I bought myself some new shorts. They are very short, comfortable, shiny, and there is no seam in the front. I want to test whether it is comfortable to choke in them. I start choking my slave with one of my favorite methods – facesitting. The slave tries to grab air with his mouth, but it doesn’t work, because the air supply to his body is blocked. He tries to tell me something, but I can’t hear him at all.
I liked it, the new shorts are very comfortable. But did my slave like them? I don’t know for sure.