I really get this. I am aversive to any kind of touch because of the shame it evokes (old stuff that replays--am working on that in therapy). What that receptionist did was make a joke that can have sexual overtones in another context. It was a foolish thing for her to say, and it triggered a shame response. And it was, in my opinion invasive. It's actually maybe a good thing to talk about to your therapist for that reason--not so much to complain about the receptionist, but to talk about how the comment felt.