I'm with, seemingly, most other people on this.
What's the big deal?
Here's a secret: I shower naked.
Actually, if my family wouldn't shoot me, I'd spend my entire day naked. Nudity ain't a thing. If it wasn't illegal, I'd be of two minds to just pull 'em down in public and take care of myself. Seriously. Its a bit of skin. It ain't sacred. You've been seen naked before, and you will countless times in the future. Unless you're planning on being a nun and taking a vow of celibacy, but even then I wouldn't be surprised if you were seen naked again.
Unless you're hyper self conscious about your body, I can't see the big deal. If you are, then I can't see why you're hyper self conscious about your body. Don't care what its like, if you're able to work and live with it, all's good.
So, yeah, honestly, not seeing the big deal. It'd be like walking in and seeing a room-mate calling their family. Yeah, a bit of private time needed, but not something to get all worked up over.
For desensitisation training, I recommend an hour of porn twice a day. See enough naked people, you'll realise just how little of a deal it is.