When He was filming he turned the camera away but told me (last night) he didn't realise she was getting changed until I pointed it out
Yeah, this bit is odd. But then again I seem to be in the minority who thinks it’s odd that a woman would choose to get totally naked in front of male room mates when there is a perfectly good bathroom there where she at least could have put her underwear on and come out if she needed to vacate the bathroom, with a towel round her or something. I just don’t see why it would be necessary for anyone to be totally naked in front of anyone else unless you WANT them to notice you ie a sexual partner.
if getting out of one set of clothes into another wouldn’t you do one item of clothing at a time anyway? Or after a shower, If I am sharing a room with DH and my teen sons I shower, leave bathroom in my towel, deodorant on, pull t shirt over my head and then turn away from them for a few seconds or go in a corner where they can’t see me while I put my bra on, pull down my top fully. put my knickers on underneath the towel, take towel off so I’m in T shirt and knickers and then pull my jeans on.
I just don’t see why someone HAS to get totally naked in those circumstances. It takes no effort or time at all to be discreet. I think she is either being very naive or is an attention-seeker, the fact that she has known them since school has no bearing on anything. They presumably are straight men attracted to women in the normal sense Ie they would find a naked female body a turn on to some extent. Most adult women would realise this and would not be getting naked in front of their male friends!
I think maybe some younger people have just seen too much titillation and exhibitionism on things like Love Island. I am astounded by the way they writhe around under the bedclothes doing private things in the least private place in the world! 
. I don’t really think it’s normal but maybe it’s becoming gradually normalised?
Christ I sound like such a old prude but I’m not, honest. I just think that naked bodies in adults are for the bedroom with your partner only. There is a reason that men does to strip clubs, they like the look of a naked woman. I don’t get nudist camps/beaches for this reason, I always wonder if nudists become desensitised to the naked form after a while. Also I’m countries where naked saunas are the norm, are people really not noticing the naked bodies of the opposite sex? If so, is it only actually touching one that turns you on in the bedroom?