It may be an anxiety thing as well? I have a friend who has shared the same sentiment and she struggles with anxiety/depression.

I think it's the choice thing and also the effort/commitment? Because you can't really halfway take a shower. You have to take off your clothes, run the water, get in, soap, rinse, get out, dry off, put clothes back on. I also don't like it because I've forgotten to do it until it's quite late and then I get anxious about not getting to bed on time.

I am going to try this tonight: just get the water running for a bit and not commit to anything else. If I can start just one part of it, maybe it will be easier to coax myself into the rest. And if not I can just turn it off again.