Green Arrow isn't typically portrayed as an asshole. He's often a hero with a strong sense of justice, but like any character, he has his flaws and moments of difficult choices.
In certain animal - centered fantasy novels, like those about magical beasts, there could be descriptions of one beast cleaning another in a way that might seem similar. For instance, if there's a dragon - like creature taking care of its smaller dragonlings, it might use its long tongue to clean parts of their bodies that could be misconstrued as something like this in a very general sense. However, these are always written in a more innocent and natural - care - giving context.
In the animal kingdom, hyenas are known for their rather strange behavior that could be related to this idea. When a young hyena is born, the mother may lick its rear end to stimulate certain functions like defecation. It's a natural part of their caregiving behavior.
No, it's not. Themes like this are considered offensive and violate basic standards of decency. Fanfiction should focus on positive aspects like character development, interesting storylines, rather than using such crude expressions.
These stories can have a bad influence on people's mental health. They might make people desensitized to inappropriate content and also have a negative impact on how people view relationships and society in general. For example, it can distort the idea of healthy family relationships. Moreover, it goes against the moral fabric of a decent society.
One problem is that it sets a bad example for readers. It normalizes vulgarity and inappropriate behavior. Another issue is that it can make the fanfiction community seem unruly and disrespectful.
He could try to have an open and honest conversation with his wife about his feelings. Maybe she doesn't realize how much it's bothering him. For example, he can say, 'I really don't like the way your boyfriend behaves. It makes me uncomfortable.'