You complain about all this stuff NOW...if she were staying just a little bit longer, who knows, you could find yourself taking a nice relaxing bath, enjoying the loofah.
Some women are just like this. Guys tend to use the bathroom as a place of function. They go in there, do their thang, and get the hell out. But some women use the bathroom as a place to get rid of stress, to just relax (hence the candle). It's definitely a little nuts that she went to all that effort for just a few days, and if she were staying longer and it was really getting in your way/bothering you, I'd recommend saying something, but in this case, it's just a few days - so just suck it up and maybe take a bubble bath.
FWIW, I'm a functional bathroom kinda guy, but occasionally, I'll break out the stereo, a few candles, a book and Mr. Bubble and just take a break from the usual stresses of the day.