Yeah this needs to be discussed beforehand. Back in my bachelor days I would legit ask if girl is on BC or not and condom or not. Have had a few occasions where I've asked permission to take condom off during the act if the condom was preventing me from getting off, and gotten the ok, and also have had girls tell me to take off condom as well. My gf doesn't like condoms, so I had thought it felt better for women without condom as well, but this seems to suggest women can't even tell the difference, which is surprising.
Above may not be smartest course because I suppose as people might have an STD and not be upfront about it, which is shitty as fuck. Young and dumb i suppose. Also people may have an STD and not even know it given how often there are no symptoms and a lack of testing frequency.
I think most stds actually happen in committed relationships too statistically, so I suppose it's dumb for both parties to not be wrapping it up, all the time every time. That shit sucks though compared to no comdom, just saying. This behavior is reprehensible though. Can't be doing that without consent.