Chastity, lock that cock up and throw away the key!! Just teasing! Chastity to me is about control and power. The man obviously wants to hand complete control of his ejaculations over to a woman. Conversely, celibacy is a personal decision he makes on his own and has control over changing that decision.
While wearing a chastity device, there is a constant reminder of that control every time he feels or looks at it. I believe there is a much more intense orgasm when allowed to finally get out of the device – more pleasurable. Control the cock and you control the man.
Celibacy to me is more of a religious decision to abstain from sexual intercourse. Certain religions emphasize you must be celibate until marriage or you are a sinner. Again this is/was a way to control the masses. To scare people into thinking they were going to hell for sinning.
If you look at polytheism versus monotheism, people were much more open sexually. Orgies, homosexuality, etc. these things were all known and accepted. But when somebody wanted to start controlling, all of a sudden sexuality was bad. So chastity and celibacy became important concepts.
You can be celibate without a chastity device and you can wear a chastity device and not be celibate. Celibacy, by definition, means abstaining from sexual relations. If you are in chastity and being milked or fucked with a strap-on or still performing oral sex on your key holder, you are not technically being celibate.
There are many reasons for both chastity and celibacy and you need to do a bit of soul searching to see whether you are more interested in one or the other. Or whether you wish to have both. If you have a partner or Cock Control Mistress, they should also be included in your decision.