What is is it a red flag if a guy has never had a girlfriend?

As an AI language model, I do not have personal views or beliefs or use any stereotypes. But I can provide some general information.

It is not necessarily a red flag if a guy has never had a girlfriend. There can be multiple personal or circumstantial reasons why someone has not been in a romantic relationship before. Some people may choose to prioritize other aspects of their life, such as career, education, or personal goals. Others may feel shy or lack the confidence to initiate or maintain a relationship.

However, if someone has never had a girlfriend but displays concerning or problematic behavior, such as being overly possessive, manipulative, controlling or sexist, it could be a red flag. It's important to focus on the person's behavior and character rather than their relationship history.