An old English pub used to keep a bowl of snuff on the bar so that all the old boys could clear their noses. One day the publican ran out of snuff so not wanting to upset the locals, he rolled up some dried dog shit and put it in the bowl.

Old man came in, took a pinch of snuff, sniffed and thought "funny, I can smell dog shit". He checked his shoes, looked around but couldnt see any he had trodden in.

Next old guy came in and the 1st man said "Hi Harry, can you smell dog shit ?"

"No" repled Harry, taking a pinch of snuff.

"Bloody hel_l" he said, "this snuff must be good, I can smell it now!"

Very good!