Once, I joked with my partner, "Are you a magician? Because whenever I see you with someone else, you make me disappear… in anger!" We laughed it off and hugged.
Haha, that's a good one! Here's another for you: "I told my partner, 'Are you a WiFi signal? Because I get disconnected every time you're around someone else!' Thanks for sharing that laugh and for the suggestion, really made my day!