Blue humor?

[FartoTheWise]

What makes comedy "blue"? Just the language or subject matter?

 

[AUFred]

I believe the language alone is enough to make it "blue"

 

[MyDigitalpoint]

A bit off-topic but when I read the thread's title -- Blue Humor -- I thought to find inside a joke related to the smurfs :jk

Talking seriously, agree that could be just the language what can make comedy blue.