It's funny that you posted about the "Secret Handshake". My DH was sure that I had a bunch of imaginary friends. On our first cruise we didn't meet any DIS'ers, so then he was pretty sure that I had some "issues" to deal with about my imaginary friends.
On our second cruise, a DIS'er got up on stage for WWTBAM (can you believe she missed a question about what Cinderella lost that the footman brought to her house?), and she mentioned the DIS. I spoke to her afterward, so then DH decided that maybe you all are real people. On our next cruise, we were supposed to meet up with someone from the DIS, but we played phone tag for four nights, so he wasn't too sure again. On our last cruise, I wasn't wearing my Mickey head, I wasn't wearing ANYTHING green, in fact, and someone came up to me in line and greeted me by name. It was quite a while before DH figured that one out (she recognized us from pictures posted...DH has a rather distinctive red beard).
Now, he's never read these boards, never had any interest at all. Last night, he just happened to look over my shoulder while I was reading, and suddenly (after 3 1/2 years

)figured out what was going on.
A secret handshake is just what we need to throw him off the trail again!
Beth