An English-man, an Irish-man and a Scots-man

There was an English man, an Irish man and a scots man. They
found a dairy slice in a cave. the scots man goes into the cave
and a voice says whatever you do don't eat the slice. so the
scots man runs out. The English man goes in and does the same
thing. the irish man goes in and eats the dairy slice. The voice
goes "i warned you once, i warned you twice, i wipped my bum on
that dairy slice!"