So I believe that there should be no secrets between a married couple and all that. But I do happen to think that there are some things that one should not have to see the other spouse doing. I am not saying that the marriage will fall apart if they do, or that you should try to shield your partner from the things that make us all fallible and human. But...
Does your spouse really need to see you on the toilet? I say no. If it can't be helped then it can't be helped, but I personally am of the opinion that things relating to the toilet should be mostly contained to the person that is carrying them out. That is an image that my husband just does not need to have stored in his brain.
Another image that springs to mind is one of me trying to take a shower not too long ago when I hurt my back very badly. I was dying for a shower, it had been a couple days, and let me tell you that baby wipes just do not cut it for the long haul. So I was desperate to at least rinse off and wash my hair. I ventured shakily and half bent into the shower, with Hubba-hubba at the ready to help if I needed any. Well, it turned out that I pushed my back a bit further than it could go, and I got a horrible spasm that sent me to my knees. In the shower.
I needed to get out, but the problem was that in our bathroom, the space where you step out of the shower sort of has the toilet kind of near it, and anything longer than three feet was not going to get out of there easily. I just don't think they designed it with people who needed to crawl out of the shower in mind. So, I was naked, wet, screeching in pain, on all fours, trying to get out of the shower. My biggest problem was trying to lift my ankles up and over the shower door railings. My friends, a pretty sight it was not. But now it is etched probably forever in the mind of my husband.
Another iffy thing is vomiting. I am all for private vomiting. I don't want anyone near me if I am to be subjected to this. I have never thought of vomiting as a funny thing, although it is sometimes played for laughs in movies and such. I loathe vomiting of any kind, and I am miserable when I do. I do not find one iota of comfort in having someone standing over me while I do it. And the whole "holding the hair" thing is overrated. I mean, just have a scrunchy handy and you can keep the misery all to yourself. It just doesn't need to be a bonding experience.
All this reminds me of a speech that my sister gave at our wedding. She had been running around the entire day, helping me with the decorations and getting ready. None of us had really eaten anything, but she did have access to a bit of champagne, which apparently went directly to her head, because boy was she buzzed when she gave her toast.
She rambled a bit and then stated the immortal words that Hubba-hubba and I always like to quote when things get a bit rough for us.
"Marriage isn't all champagne and roses, ya know. Sometimes it's about being sick and throwing up, and being there for them to help clean it up."
I agree, but nobody said that I had to actually witness all of it.