I've met couples who seem to do exactly that and not feel at all awkward about it. They share the bathroom, show each other their wobbly bits, hoover up cake and chocolates, plough through chicklit, and don't feel any furtive need to conceal anything.
I incline that way too. I might feel a bit embarrassed at times about having an audience, but seldom do I actually hide anything - unless I'm asked to. There are very few things I'd rather keep to myself.
I was checking through a list of activities that people commonly don't want their partner to witness, and personally I wouldn't be too bothered by any of them. For example:
- Getting dressed or undressed
- Trying on clothes
- Weighing yourself
- Eating something unhealthy or bingeing
- Enjoying a trashy novel/music/film etc
- Pleasuring yourself
- Personal grooming
- Crying/being seriously upset
- Buying something expensive
- Using pornography
It's sad that someone feels so embarrassed or ashamed by their body or their behaviour, or so scared of a judgmental and censorious partner, that they simply can't stand to be seen. But such reticence is easily learnt, and hard to shake off once it's engrained.