Half a Brain

John decides to change his gender; he saves his money for years and finally goes to the operation.
One week later he returns to the bar, and now he/she is a beautiful blonde.
His friend ask him :
- Hey tell us, how that operation was like?
- Well, he says, it was the worst experience I had in my life!
- Why ? asks the friend.
- Well, when they put on the tits, it was aching like hell. When they cut off my dick, I felt like I could die.
But then the worst was when they started cutting half of my brain...