Humm, bbbj? I am rather persavive getting ladies on the 2nd or 3rd time to upgrade to a bbbj for a rather large extra tip. I have tried this with Sandy and she never budged at all. Last time she got rather pissy at me for about 1 minute, with I have told you NO before. Calmed things down and everything was good. I usually don't report this upgrade in my reviews because I'll be accused of wrecking the hobby for everyone.
Of course some ladies are extremely good at sneaking a cover on, very quickly in a dark room. Almost like a magic trick.