Two rich Americans decided to go ice fishing in Canada. They chartered a small plane on skis, and landed on a secluded Manitoba lake. They unloaded all their gear, the heated fishing hut, rods, reels, bait, power ice auger, etc. Once set up they cut the hole in the ice and commenced to fish. After half a day they hadn't caught a thing, but they noticed an old, obviously local chap about 200 yards away, sitting there in the open with a stick with a bit of string on for gear, and he was hauling in substantial fish one after the other.
After having spent all the money to get there, and not wanting to get "skunked" they decided to go over and ask the old man what his secret to catching fish was.
He replied "Yomb guta mmmb ya mmmmbss wmb"
They said "Sorry, sir, we didn't understand what you said"
The old man opened his mouth, emptied it into his hand and said "You've got to keep your worms warm!!"