This greatly depends on the chastity belt
You need shaving near any plastic belts
such as dickcage or cb-3000
but just the area of the cage, unless your master or mistress has asked for more
Now metal cages light ones that go just on dick and balls
can be worn while still fairly fuzzy
but some of the heavy ones
over 1 lb, do tug or pinch if hair gets caught in the cage
the 2 pound crome cage, ofr my 2 pound Kali cage requires fully shaven.
However the lightweight cage
by dongeon delights is one you can wear with out shaving
granted there may still be a bit of tugging or pulling
but simple pulling on skin adjusts to a comfortable fit
http://www.dungeondelights.com/store/pr ... cts_id=119
however it is no secret that I promoted them so much
that they are a link partner, and am generally a pusher of their products
this is because of many good reasons
but you may decide yourself.
Generally all cages requires at least trimming
if not full blown shave with a razor (electric or otherwise)
I think you will find almost everyone would agree that shaving and cages go together.
I think I can say if you own a chastity belt, shave.
at least until you get to know how it fits/works
then you can let your hair grow again.. until it gets uncomfortable.
This is definitely what I recommend.