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.
When your partner suggested you try some bondage to spice things up, you never imaged it would start with 3 weeks of chastity followed by a shibari session ending in free use for all your partner's friends.
You couldn't believe your progress. All the working out, denial, teasing, it was all coming together. Tonight at the party, no one was going to recognize you, and the fact it was a party known to have a lot of nudity, you were in for a wild ride.