Three Lassies

I was out at the pub the other night and overheard three rather well-nourished girls chatting at the bar.  Their accent seemed to me to be Scottish, so I approached them and asked, "Hello there, are you three lassies from Scotland?"

They all frowned, and one of them replied indignantly, "It's Wales, you bloody idiot!  WALES!"

So of course I apologized and rephrased,  "I am so sorry. Are you three whales from Scotland?"

And . . . that's the last thing I remember.