![](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
"The CHALLENGING
climate of Scandinavia
The Big Bang Theory Season 12, Episode 23
![It really doesn't matter
as long as it's challenging.
It really doesn't matter
as long as it's challenging.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
It really doesn't matter
as long as it's CHALLENGING.
The Big Bang Theory Season 10, Episode 22
![Being your girlfriend is so challenging.
Being your girlfriend is so challenging.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Being your girlfriend is so CHALLENGING.
The Big Bang Theory Season 8, Episode 24
![Intimacy in any form
has been challenging for me,
Intimacy in any form
has been challenging for me,](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Intimacy in any form
has been CHALLENGING for me,
The Big Bang Theory Season 9, Episode 11
![...indicating he's challenging
the ruling on the field.
...indicating he's challenging
the ruling on the field.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
...indicating he's CHALLENGING
the ruling on the field.
The Big Bang Theory Season 3, Episode 6