This story is from an ex girlfriend but I just found this sub a figured it would fit

So me and my ex were experimenting with femdom and she decided to buy me a chastity cage, she went on holidays with her fam and left me locked up for just over a week.

When we met up again I was the horniest id ever been and she kept me locked up while I ate her out and played with her, eventually she let me fuck her but I had to use a strap on, so I put on the strap and attached the biggest dildo we had

We were fucking with it on and in about 4 pumps id cum coving the sheets while still in my cage, she just looked at me and laughed, humiliated me and made me fuck her with the dildo till she came

It was quite possibly the hottest thing that had ever happened to me I loved every second of it And it led to her calling me a prejac for the rest of our relationship training me to be quicker and quicker, now if I'm presented with sex I can cum in under 3 pumps it's the hottest and worst thing that has ever happened to me