Not a Chapter! Sorry, just my thinking and reason's why Darwin tops Gumball.
We know who obviously wears the dress. OF COURSE Gumball would. It's not really hard to tell and only a blind person would not recognize that as a MAJOR sign. Not only does he wear dresses, but cheerleading outfits and overall girly clothes. Really, a sweater? I'm a girl and I wear sweaters. My Boyfriend and his friends do NOT wear sweaters. Plus those jeans fit so…snuggly.
While they both have girly voices, Darwin still manages to be more manly. I don't know how but he does.
During the Prank when they were acting out TV shows, they pretended to be in a Soap Opera, Gumball plays the woman. Conscience? I think not.
When they 'had' Kenneth(if you don't remember Kenneth then you have no right being on TAWOG Fanfic), Gumball was the mother and Darwin was the father. They took these roles on very seriously too.
Gumball just overall looks and acts like a girly character.
These are some of the reasons(others I cant think of but I'm sure there is more) why I believe Darwin would totally top Gumball.
Also, I will try to update as soon as possible. Been having some family issues, I know you don't care but I will tell you anyway. My Grandfather has 2 brain tumors and my unborn cousin has Hypo-plastic Left Heart Syndrome.
Pray for them and I will update soon!