I haven't read all the responses, but enough to get a feel for the thread I think.
And those people objecting to ONS mostly seem to be doing so on the basis that they, personally, have not enjoyed them/would not enjoy them.
And I don't see why that's a reason to object to them, or counsel other women not to have them!
I have no interest in playing golf. Never tried it, but know enough about it to feel confident it wouldn't appeal.
I would NEVER counsel another woman, be she a younger relative or a stranger on the internet, to avoid golf.
All women are different, and we all like different things.
I have had stages of my life where I have found ONS absolutely great fun. Liberating, confidence building, adventurous, enjoyable.
I'm confident enough in sex (now, wasn't always) to ask for things I enjoy, so I usually found them physically gratifying and was often able to orgasm.
Indeed, until I was in my late 30s, and after two marriages, it remained true that technically the best sex I had ever had, was with a ONS partner. I was shyer at that point and sometimes didn't feel confident enough expressing my needs with guys I really liked - but because I knew this was only ever going to be a ONS, I told him exactly how to please me - he did just that, and very skilfully as it happened - it was mind-blowing! And I have friends who have also told me their best sex was with a casual partner.
I've since developed the confidence to bring that energy to all the sex I have, whether in a LTR or not, and consequently have inevitably started having even better sex, with my best ever now being with my current partner, with whom I can communicate more freely and honestly about sex than with anybody else I have ever met.... .. But my point is, if you tell someone what you want, and they are happy to do it, the sex is likely to be good whether it's a ONS OR an LTR. It's entirely fallacious to suggest that all guys having ONS don't give a fuck about the woman's pleasure, whereas all guys in LTRs massively prioritise it ....
Anyway, I digress. The point it, a fully consensual ONS harms nobody. So if a woman wants to have one, why the fuck shouldn't she?
To suggest that they are harming the women having them, in some super-subtle way these women don't realise, is to suggest that you know people you have never met, better than they know themselves.....