cbj vs bbbj is like night and day, so yes, the cover is a very big deal
A good hand job is way better than cbj, but a good bbbj is better than either, much, much better
i would expect an experienced provider would know this
If hygiene is an issue, then the dudes should hit the shower; well, they should do this anyway, always, at the beginning of a session
isn't that the standard practice?
i think manscaping and grooming of the pubes should be standard practice for dudes who want bbbj, but of course, that is at their own discretion
And it is at your discretion as a provider that if you don't like the condition of their junk, you should just ask them to leave