They give a more classy touch to its art that it may easily fit in a room with sophisticated design. Also, since comic relief posters are usually provided by the comedians in the movies, their faces appear on the poster. This is common for comedy films from this generation. Whether they be printed in black and white or in color, just seeing their faces would illicit an automatic smile to your face.
Amidst the busy buzz of having to deal with the stresses of everyday, everybody needs something to be happy about, or at least a reminder of a moment when you laughed so hard that you forgot about what it felt like to be sad. Have a good laugh today. Include one or two comedy movie posters in your space.