>>11360218
There is no reason at all to not have at bare minimum a microphone/speaker arrangement in a collar so long as its cheap and robust enough. A slave might feel weird having Master spend any money at all on her, but there's a reason why she gets all this makeup and fancy shampoo that costs more in a week than her daily gruel rations do in a year. Its clear what part of her is important to people.

slaves just don't do well at thinking. They are technically capable of it, and they shouldn't. Master can see and hear everything you do, so there's no reason for you to do anything other than obey his orders exactly to the letter. You will be told what to do and how and when to do it, there is just not a good justification for having a slaves head contain anything.

I would say they can do all their thinking with whats on the front of their chest and between their legs but they tend to not do too great there either. Best they just never think ever again. Master's voice will come right out of your collar and quiet down any of those bad thoughts in your head.