Subway car cartoons often have colorful and exaggerated designs. They might show funny characters or interesting stories happening inside the subway cars.
In a story, 'friends comic relief' is like a breath of fresh air. It could be a friend making a funny face at the right moment, cracking a joke when things are getting too serious, or doing something silly that makes everyone laugh. It not only brings some fun but also makes the characters and their relationships more relatable and charming.
You could also check out some children's illustration websites or blogs. Sometimes illustrators share their cute and funny deer cartoon clipart there for free. Just do a simple Google search and you'll likely come across some useful results.
The reason might be that the creator of the cartoon wanted to emphasize a genetic or family trait. Or it could simply be a random artistic decision to make the image more interesting and memorable.