Well, I gotta admit, I am generally NOT comfortable with the idea of seeing my guy talking on the phone, regardless who he was talking to or what he was saying.
I've been Deaf forever and I see someone close to me talking on the phone, it makes me feel awkward. I have no idea to know when it is a good time to interrupt or if I should wait or ignore him or her and do my things instead.
However, when it comes to relationships and as a part of the Deaf culture, I expect for my guy to explain the phone call. Not necessarily because he can talk on the phone, it's because it is common courtesy we choose to practice. It is not about sharing all the secrets with someone you love either. I'd tell them what my TTY call was about.
Because of this courtesy we practice in our community, a hearing partner may be confused by this. And the list goes on, too...
For example, in my family, when someone comes home, he or she would yell, "Hey, I'm home" and that was enough, but in my culture, it was NOT even close. Whenever my friends or roomies come home, they'd walk up to me and say, "Hey" to let me know that they're home. I've grown accustomed to that, so I have my own share of problems whenever I go visiting my family. ("Hey, why didn't you tell me that?" Confused faces would look my direction. Oops)
To better visialize what is cheating here....
What would you do if you see your hearing husband/wife talking to your children without using sign language in front of you?
Is that called "rude?"
You BETCHA!