Nice joke

[Giles]

A farmer was out on his Welsh hillside tending his flock one day, when he saw a man drinking with a cupped hand from the stream that ran down from one of his fields.
With alarm, the farmer shouts "Paidwch ar yfed! Mae'r dwr yn ych-y-fi bach! [Don't drink it, the water is disgusting!]

The walker looks up, makes the international sign of "I can't hear you" and continues to drink.

The farmer, panicking a bit now, runs full tilt towards the man and shouts again. "Paidwch ar yfed! Mae'r dwr yn ych-y-fi ! Defaid yn cachu yn y dwr!" [Don't drink it, the water is disgusting, the sheep have crapped in it!].

Still the walker continues to drink, baffled at the rantings of the crazy mountain man.

Finally, the farmer gets to the man, and after recovering his breath says "Dwr yn ych-y-fi, paidwch a'i yfed!" [The waters disgusting, dont drink it!]

In his finest cut glass posh London accent, the walker says "Frightfully sorry old boy, couldn't understand a word you were saying. Could you say it again in english?"

"Sorry" says the farmer, "I was just saying that if you use two hands you can get more in"