From a kids book of brain teasers came the -- "Two boys who look exactly alike, have the same birthday, share the same mother and father......are not twins. Why?"
Of course, the answer is that they are two of a set of triplets.
I was made to remember that teaser in a rather funny way. I was doing a show in Loiusville about twenty years ago. It was a somewhat slow day and I was sort of half reading a magazine to ward off boredome, when four young women walked up to my dislay and started looking. I looked up from the magazine and then did a double take -- three of the women.......I could not tell apart! I had never actually seen triplets before so, as they made a puchase, I asked them if they were indeed triplets.
Turns out that there weren't even twins among the three -- but what's more, the fourth woman with them (the only blond among these three very dark, almost mediteranean looking women) said told me that she too was a full sister!
well, that's what she said>.