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.
You were told you'd be locked in the cage until you willingly ate your own cum, you figured it wouldn't be hard, you had eaten a little off your hand before. Unbeknownst to you, your owner's idea was an entire bowl load. It took a long time to save it