"He talks on the telephone."
Translation:Lui parla al telefono.
I guess that's how we'll have to think of it in Italian. Come to think of it, when we say,"I'm on the phone" in English, we're not actually sitting on top of the phone. That's probably a funny image to Italians learning English. :)
You're right. Sometimes I think up English phrases that are just as ludicrous.
I suspect that it is simply that, in English, we talk 'on' the phone, in Italian they talk 'at' the phone. :)