The Big Bang Theory Season 7 Episode 18
The Mommy Observation
Sheldon pays a surprise visit to his mother and sees her having sex through the window. He doesn't handle it well. He eventually accepts it with Howard's help.
At home, Raj plans a murder mystery party, but it's a bomb. No one has any fun. It causes disagreements between Penny and Leonard over their future.
Well, I told Howie if I wasn't busy I'd spend the night at his mom's. So for God's sake think of something.Bernadette
He has a very sensitive butt. Well, it's true. I once saw him sit on a bunch of loose change and add it all up.Leonard