Hi, I hadn't even considered chastity until 4 weeks ago when my gf went away for a week. While she was away I wished she had locked me up and taken the key with her. That urge persisted after she returned and so I mentioned it to her and she was happy for me to give it a go. I have now been locked up for exactly 24hrs
After her initial acceptance, my gf has kind of gone off the idea now. She didn't realise I would be in it all day including sleeping and peeing. She saw it more as a bit of fun for a few hours in an evening. Neverless she knows it is something I wanted to try and so has agreed to keep me locked for another 3 days.
Day 1 has been overwhelming mix of new sensations. It's never been painful, just constant half erections, and took me a while to pee sitting down. Even though I was desperate I would get semi hard and couldn't go. My cage ring is slightly too big (but definitely not enough that I'm escaping from it) so straight away I used a shoe lace to keep it secure and it also felt much more comfortable after that.
Now I'm on day 2 and Im getting used to the cage being there. My mind is less occupied by the physical sensations and more the constant reminder that I am not getting released for a few more days yet. The need for sexual release is also building up nicely.
I don't expect my gf will fully understand this kink but I have three days to convince her, and I am going to do everything I can to make sure she enjoys those three days.
One of the hottest scenarios I can imagine is her key in her hand about to release me on the agreed day and then changing her mind and keeping me locked for a bit longer. I will mention that to her and maybe she will add another day on.
Worst case I have been very fortunate to get to experience this, and even if my gf doesn't see the appeal she is so great that I know she'll be willing to indulge in this again occasionally. While we are both very vanilla we play lots of games and this will definitely be another option for a forfeit/prize.