I was obviously not clear in my post
Your post earlier wasn't unclear, but the above one is; I don't know which parts are quotes or what the emboldened bits are from but I'll try
When are they asking? If it's on the phone/text then it means they haven't read your ad (so you can just direct them back there) and if it's in the room then likewise but maybe wind up your call with something like 'and is there anything you'd like to ask about or check that wasn't covered by my ad?' (they virtually always say no IME, which means they have to admit they didn't read it properly in the event something they want isn't on offer).
Before I joined here, just going from my massage parlour experience, I thought OWO was basically standard for younger ladies
I don't think it's related to age so much as being new - I did OWO when I first started not because I particularly wanted to, but because it honestly never occurred to me that somebody would put on a condom for a blow job. As soon as I realised that it was perfectly normal to do so in order to protect yourself, I stopped and did exactly that (and I found a lot of punters had no idea they could catch STIs from OWO at the time too, although I'd hope people are more clued up these days
I suspect not).
It's also possible that younger women are easier to bully and manipulate into offering services they'd rather not. I hope that isn't true (and I certainly wasn't), but it may well come into it.