I've previously worn the CB3K, a couple of times for as long as 6 weeks. I'm currently wearing a CB2K, today is Day 12.
Wearing the 3k, there was enough room to expand that when my cock would try to get hard. Enough room that when I'd get to the level of semi-hardness the device would allow my cock in the device would stand forward.
Now, wearing the 2K I can't do that. The 2K doesn't look that much smaller than the 3K but it doesn't allow any room for expansion and there is no semi-hardness. It's only increasing the frustration level to find that I can't even try to get hard.
Also, I'm as I previously mentioned, I'm going on an all gay cruise in Feburary. I'm interested in hearing about any experiences, either yours or someone you know, that has gone on an all gay cruise without access to their cock. Thanks.