It could be that the creators wanted to show a special moment of connection between the characters. Or perhaps it's a part of a larger theme or message the cartoon is trying to convey through these kinds of images.
The copyright for Sonic comics is usually held by the publisher or the company that created the Sonic franchise. It's a complex matter involving various legal and licensing agreements.
The TNMT comic and its adaptations can vary in terms of visual style, pacing, and sometimes the addition or omission of certain storylines. For example, the animation might simplify complex comic plots for better understanding on screen.
The concept you brought up is not something that should be explored or discussed. Such content is often considered unacceptable and can have negative impacts. Let's turn our attention to more beneficial and proper topics.