Sheldon said several "worldly" things at the beginning of the episode, which don't exactly fit with his character (IMO).

2ndly - come on! Leonard's mom is a psychologist - she doesn't know what human behaviour is like when drinking and what it is to be loved !!! COME ON!

I can't wait to meet his Dad !!!

lol! Maybe his dad is a little more normal, since he ran off with a waitress. What did you think of that forceful kiss she gave Sheldon? I thought she was gonna knock him down. lol!