Brain Operation

This German guy wanted to marry this Polish lady, but Poland had a law that you have to be Polish in order to marry someone that is Polish, so, in other words, he'd have to have 50% of his brain removed. So he goes to his doctor and says:

- I've just got to marry this woman, I love her so much...

So the doctor says:

- Well, it's risky, but okay.

So into the operating room they go for the brain removal procedure.

Later, when the German guy wakes up, the doctor comes in and says:

- We are verrrryyyy sorry, but we accidentally removed 75% of your brain instead of 50%.

The guy looks up and says:

- Mama Mia!