I read this yesterday and had time to think about it. It appears to me that when you were diagnosed as being deaf, you or someone else never took the time and/or taught you that you need to sharpen your other senses. As you know, you have five senses. Take out the hearing, you have four. Actually, if one includes reading body language/situations, that would be the fifth one, which replaces hearing.
Have you done this? Also, what do you need "privacy" for? I'm sure if he hasn't seen something on you that he hasn't seen before, he would most definately do something about it.
Along that thought, did you know that a few years ago, my hearing dog ran into a skunk. It was late at night and I couldn't return home, as I was heading to my parents house, 150 miles one way. So, I phoned them and told them what was going on. I picked up supplies to bathe Snickers when we arrived, but, before she went in, my parents & I devised a strategy to minimize other tenents from smelling skunk.
Because I modeled nude for art classes, I didn't want my only clothes ruined either. So, my parents and I stripped the bathroom of everything . . . rug, shower curtains, towels, soap dispensers, toilet paper. When I brought Snickers in, my dad blocked the way into the kitchen, both bedroom doors were closed, my mother would grab her while I was literally peeling off all my clothes, which she hasn't seen me nude since I was a little kid. She helped me bathe Snickers, while I held her in the bathtub (Snickers and I were both in the tub).
There was nothing sexual that occurred between us, yet we had quite a time to rid that smell from Snickers. Guaranteed she'll never do that stunt again!
Now, what's that thing about privacy you mentioned? I'm a guy that's older than you and I had no problem doing this. If you feel embarrassed about your own skin, I also am a member of clothesfreeforums.com, which is a naturist website. Check it out!