Agree. My wife's mum did that many years ago. We were alone talking and she started tugging at her blouse, then lifted up her skirt to pull her blouse down. Black lace knickers and stockings. Wow. A few weeks later we had some fun.
Girls can bear up against pain more than boys, so its absolute ok, when her ass is red. And then she must wear a chastity belt for a few days, therewith she cant give herself a relief (orgasm). Maybe a better learning effect!