I'll admit, I walked into the bathroom at the airport talking to my mom, but I couldn't hear out in the terminal because of all of the announcements and it was about getting a script filled that I so badly needed.
I will also talk to only 3 people on the phone while I'm going to the bathroom, it's only ever at home, and I have asked all of them if they mind; seeing as 2 of the 3 do it back to me, it's not so bad. They are my mother, my sister, and my best friend. Best friend rarely ever gets it but if I have to go, I just let her know she might hear some funny noises. She and I almost never talk on the phone (honestly, I hate talking on phones for very long but that's because I have a hard time focusing) and it's usually during a break of some sort, so we don't want to hang up. It almost never happens with her, like I said, but neither of us mind. I guess that's what makes it different, that I have asked, they have said its okay.