You always thought you had problems with being insensitive down there, however, it would appear you just jerked off too much and lost sensitivity, 2 months in chastity fixed that.
It never occurred to you that the reason your anal plug kept changing patterns was because your girlfriend was live streaming you all gagged and locked, and the audience was controlling it.
You're mistress knew all she ever had to do was talk about touching you and you would get hard and feel the endless frustration of the cage, however, on certain days she would take down your panties and rub herself against you cage. It was almost enough