So there's this guy who's making Aliya to Israel and hears that he can make a mint off appliances becasue the Israeli tax laws make you literally sell your organs to afford one. So he fills his lift up with fridges. 7, to be exact.
But when he gets to Israel he is accosted by customs.
"We see that you have 7 fridges on your lift. Are you planning on selling them?".
"No way", he answers, "they are all for personal use".
"And what use might that be?"
"Well, um, one is for Milchig and one for Fleishigs".
"OK. That's 2"
He starts thinking harder. "One for Pareve".
"3."
"Hrmmm... Oh yeah! Pesach. We need separate fridges for Pesach!"
"OK, thats 6, what about the seventh?"
"So what if i want to eat a little Treif here or there."