That’s very interesting, I hope you don’t mind if I bring something else up that I see as well. It has nothing to do with this, but it is also something that I learned as a kid and reiterated in Kallah class and yet I see women forgetting and/or ignoring for convenience sake.
At the nail salon, many women including Frum women often ask to get their mani/pedi done at the same time to speed things up and save time. That means that two women are working on you at the same time. I was always told as a child, that only on a “mais” are more than one person allowed to work on the same person. For instance when dressing a child, the mother can’t put on the hat and coat while the father puts on the boots. Or a Kallah, someone can’t help her into her shoes, while another girls is zipping her dress.
I explained that to my manicurist and whenever they suggest I do it to speed things up, I tell them “I’m not dead yet” and we all laugh. But seriously, is this halacha or just superstition? Did I just believe this to be halacha because we took it so seriously all our lives?