Nudity doesn't embarass me in safe, repectable company.
So many Brits associate adult nudity only with sex - and shame 
In most other EU countries, it would be considered mad - and unhygenic - to shower in a swimsuit indoors, or change under a towel. Those countries tend to be less promiscuous than the UK, not more.
Also, I wonder how many UK women give up early on bfing because of anxiety that some stranger may see a boob. Embarassment seems a factor for some women.
I don't know why, but the UK seems to be becoming more intolerant of casual nudity: many gyms have replaced communal showers with cubicles, even school kids seem far more bothered by communal changing rooms now.
I'm at ease being naked in communal changing rooms and showers. Some of us walk around naked while doing hair, makeup, chatting.
That's NOT strutting
- no deliberate showing off my muscles; I'm just relaxed about casual nudity.
I don't criticise those who don't want to strip off < shrugs > your bod, your choice. Just don't demand I rush my routine so I can cover up my body because you are embarassed.
I've visited mixed saunas in Germany & Sweden on my own, then jumped naked into the cold pool afterwards with everyone, no embarassment just goose pimples, brrr