They both enjoy handshakes.
A
Because they always try to mess with his nails.
Ten. (Shame this one doesn't work too well for reddit - the funniest part of this joke is the third punchline enjoying people struggle to understand what the hell you're talking about.)
Election posters. There they are portable, silent and easy to remove.
Two. One to change it and another one to change it back again.
A handshake