Kasen, are you confident in your throat

Of course! My name isn't Kasen for nothing, you know! Rather than the usual kanji for her name, she's using the kanji for "great poet" or "great singer" here, also pronounced "Kasen".

Then, are you confident in your uvula as well? A common slang word for uvula is のどちんこ, literally "throat-dick".

Well... no, my uvula is pretty normal...

Then how many times a week do you do the throat-dick thing?

About the size of the dicks in your throat...