YMMV, but the best motivation for being in chastity is that the denial of the easy thing (stroking your cock) can lead to much greater pleasure.
For me, I always enjoyed ass play, but when locked up, it becomes WAY more intense and the intensity of pleasure from getting fucked or dildo play becomes something else entirely. Instead of a blast-and-you're-done, you can let the feelings rise and rise to a place you've never felt.
Plus (and this may be a bigger deal for you depending on how you're wired) locking up and staying locked up can make you feel more submissive and eager to please others. (Imagine being at the point where you feel like giving someone else a blowjob might give YOU an orgasm!)
All that said, if you're getting your first cage, don't worry too much about extended lockups right off the bat. Put on the cage, get used to how it feels, both when you're soft and when you're trying to get hard. It might be difficult to sleep overnight with it on right away... just focus on wearing it, feeling safe and comfortable in it, and
then start to stretch out how long you're locked for.
If it works for you, you might soon find yourself locked for months on end, and amazingly turned on by the idea of doing things you'd never consider right now...
