When you live in the suburbs, it's probably not a good idea to have a bare window in your bathroom. Even if that window doesn't go below shoulder height and is on the second floor. Or so Kevin tells me.
Our first attempt to cover the window without blocking the light was window film. We first used the rice paper texture, but Kevin thought it blocked too much.
Next we tried more of a frosted/pebbled glass look. That was better. But we eventually realised that we were still perfectly visible at night. So Kevin asked me to make a curtain. 6 months ago. In the picture below from my Spring Cleaning post, you can see the little cafe curtain rod I attached to the plastic frame using double-sided picture hanging tape. I had to install it upside down because I wanted it as high within the frame as possible. but the end clips/brackets hold it securely enough for the lightweight voile I used.
I quite like the softness the curtain gives to our little square window.