I remember a Little Johnny version of that joke - too funny!
Speaking of Lil' Johnny, here is his encounter with Santa Claus:
Little Johnny is sitting on Santa's lap at the mall, and Santa puts his finger on the boy's nose and says "I bet your name is (spells out ) J-o-h-n-n-y?"
Little Johnny's eyes light up, and Santa puts his finger on Little Johnny's nose again and says " I bet you want a (spelled out ) b-i-k-e?"
Little Johnny's eyes light up even more and he asks "How'd you know that?"
Santa replied "Because I'm Santa, I know everything".
Little Johnny then gets a funny look in his eyes and he says to Santa, "I bet you like (spells out ) g-i-r-l-s?"
Santa says "Yes, how'd you know that ?"
Little Johnny solemnly replies, " Beacause your finger smells like P-U-S-S-Y!"
ADG