![Mr. Jeffries, I'm Leonard.
This is my girlfriend, Penny.
Mr. Jeffries, I'm Leonard.
This is my girlfriend, Penny.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Mr. Jeffries, I'm Leonard.
This is my GIRLFRIEND, Penny.
The Big Bang Theory Season 6, Episode 22
![You're at the top of your field,
you have a great girlfriend.
You're at the top of your field,
you have a great girlfriend.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
You're at the top of your field,
you have a great GIRLFRIEND.
The Big Bang Theory Season 10, Episode 9
![Let me give you
a little girlfriend 101.
Let me give you
a little girlfriend 101.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Let me give you
a little GIRLFRIEND 101.
The Big Bang Theory Season 5, Episode 19
![So Sheldon says you have a new girlfriend.
So Sheldon says you have a new girlfriend.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
So Sheldon says you have a new GIRLFRIEND.
The Big Bang Theory Season 10, Episode 21
![What, you invited
your girlfriend?!
What, you invited
your girlfriend?!](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
What, you invited
your GIRLFRIEND?!
The Big Bang Theory Season 5, Episode 19