Black Widow isn't a redhead in the comics. Her appearance is subject to interpretation by different comic book creators, but red hair is not a common feature for her.
No, it is not appropriate at all. Such content involves vulgar and inappropriate sexual implications which violate moral and ethical standards. We should focus on positive, respectful and family - friendly topics in communication.
Yes, in some farming communities, there are stories about how black roosters are great at protecting the hen house from predators. Their loud crowing and brave nature are often part of these tales.