You're paying for the time.. if you choose to want a CBJ vs. BBBJ, I honestly do not see any provider becoming offended... same for if you wanted to skip it all together. If you're really that concerned about bringing it up, you could always see a provider that only does CBJ, hence, you don't have to ask her to cover it up, it's already mandatory

Your comfort is what is most important. I personally would have the up most respect for you for practicing  extreme caution to insure your safety. I always have flavored condoms on hand to accommodate that very request. Bananas! Mmmmmm........

and your session, so you can do whatever you feel comfortable doing. If you want to have a covered session, all you would have to do is ask. I wouldn't think that it would offend many ladies to know you were looking out for yourself.

Have fun and play safe

Summer

I am a bbbj lady I saw a guy the other day when I arrived he said he would prefer a cbj and would I mind?I told him no problem because it really isn't a problem for me. I am here for him if that is his preference I am certainly not going to feel awkward or be offended.
One  cbj coming right up
!You are doing too much assuming just let her know what you want and have a good time.I am pretty sure many ladies will not have a problem with your request.
A mood killer is not expressing what you want and the lady does not know especially if you are seeing bbbj ladies.I want guys to speak up and let me know what their likes and dislikes are that is what makes for the best encounter.
Good idea with the extended daty what lady doesn't love that especially if it is done the right way.lol!

to get past the laytex taste.  

It might be a good idea to ask the lady, after screening is complete, that you want all services covered.  Be a gentleman, don't be graphic.  Ladies might have a different idea on this.