@agracier
Not many of the replies on this thread answer your actual question, but I can relate one example of what you were actually asking about.
Growing up, I had a friend (a boy) who had an older sister and a younger sister. When they got in trouble, they were required to report to their father's workshop, already stripped down to their undergarments, at a specified time (usually 7pm, I think). Therefore, if all three of them were to be disciplined, all three of them would strip in their bedrooms and then make their way through the house and out to the workshop (at the back of their property) at 7pm. Mr. Lathrop was the disciplinarian, unless he was unavailable. If he was administering a paddling or strapping, it went about as you might expect... one at a time, each kid would come forward, bend over the saw horse, have his or her underpants/panties lowered, and receive his or her swats from their fully clothed father.
However... On those occassions when Mrs. Lathrop was the disciplinarian, the ritual unfolded a little differently. She would always arrive in the workshop with a 3 foot long (approximately) stiff-but-flexible freshly cut "hickory switch" (not necessarily cut from a hickory tree, but called a "hickory" switch nonetheless). She would then say, "Okay, time to get stripped and striped." At this point, my friend and his sisters knew they were required to remove their remaining undergarments (underpants, bras, and panties). While the kids were removing their undergarments, Mrs. Lathrop would remove her dress and hang it on a hook in the workshop. At some point, when they were quite young, she had made some sort of comments that her dresses were very tight (which was true -- she almost always wore those expensive tight-but-conservative dresses that buttoned up the front), so she needed more flexibility, didn't want to rip her dress, or get it dirty... which seemed reasonable to the kids, I guess. Anyway, she would give the kids really good stripes across their bare bottoms while wearing only her bra, panties, and shoes.
I have first hand knowledge of this because I once spent about 10 days with the Lathrops, and got into some trouble with my friend and his younger sister. Parents back then in my community didn't give or request explicit permission for kids to be spanked (if you misbehaved, almost any adult who had authority over you at the time would spank you)... and although I was surprised that Mrs. Lathrop took off her dress to administer the hickory switch, I didn't think too much of it. Being naked in front of my friend and his sister was what mostly embarrassed me... actually, not even the nudity in and of itself, but seeing the srtipes on the other bottoms and knowing that the others were seeing the switch create the stripes that I was feeling across my bottom was very humbling.
Looking back on it decades later, I make two observations... 1> At the time, I just perceived her as an old adult, but she was probably only about 35 years old when I received my thrashing from her, and she was almost certainly considered a very attactive woman at the time, and 2> She probably did experience some sexual fulfillment from requiring kids to strip completely naked and taking off her dress before thrashing their bottoms with a hickory switch.
I do want to emphasize again that "good whippings" for naughty boys and girls was standard operating procedure back then in our community. It was obvious that there was a sexual tension involved in spankings because older boys often got erections and were told, "Don't worry about it. It's normal for this to happen to boys sometimes. It might be embarrassing, so behave if you don't want to be embarrassed and have a sore bottom." It wasn't hard for us kids to figure out that girls also often experienced sexual tension/arousal when receiving a spanking, even if it wasn't as obvious. And, it stands to reason that the disciplinarians were also often experiencing some sexual tension/arousal. I think it was believed that "good spankings" were an effective and healthy way to administer discipline/punishment, and the sexual tension was simply acknowleged as natural and not considered unhealthy, so long as it was kept under control and certain boundaries were maintained.