Usually we just talk about what it would be like to have dicks for hands. Handshakes would be an obvious problem. We wouldn’t even call them that. They’d be dickshakes. And our hands would have to be where our dicks are now, so if you wanted to do an old-fashioned handshake, you’d have to thrust at the guy you were trying to shake hands with. And this of course says nothing of the problems of intercourse.