Scottish joke?

I was in a pub on Saturday night. Had a few....

I noticed two large women by the bar.

They both had strong accents so I asked, "Hey, are you two ladies from Scotland?"

One of them chirped: "It's WALES you friggin' idiot!"

So, I immediately apologized and said..., "Sorry, are you two whales from Scotland ?"

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