I've had all different type of situations with the phone. Sometimes, even a dear friend who doesn't wish to answer the phone, might have to for whatever reason.
Either way, it doesn't bother me.
Although I've done the whole "having sex" thing while my partner was on the phone, frankly ... it happened more frequently when I used to date years ago ... but not to throw cold water on a potentially hot sounding topic ... I'll do whatever but it seems rather ... never mind.
Yes ... being intimate while my partner is on the phone is sometimes fun. Sometimes, it's dicey at best. Guess that is what I was trying to state above.
I think for an important business call coming in, probably stopping the action for a few moments is best. But I've given head while my friend has been driving down the road.
And I've had a lot of public sex.
So I'm hardly a role model for decorum. In the end, the client has to do what works for him best. And that could change from appointment to appointment.