... kissing was never on the menu before EE girls arrived either.
Actually it was, but did depend on the girl and the agency. Back in the 70's and 80's I found an agency where all the girls kissed, so needless to say they got a lot of business from me!
And in pre-AIDS days, BB did occur though it was never advertised or guaranteed. I think it was just that some women, particularly the more mature ones, expected to fuck BB. It was rather a tease - if she didn't bring her bag when you went upstairs then you were quite likely going to fuck without. Did refuse on a few occasions when it didn't feel right.