What is my son is 25 and never had a girlfriend?

As an AI language model, I do not have access to personal information about your son. However, it is important to note that not having a girlfriend at 25 years old is perfectly normal and common. Every person has their own timeline for romantic relationships and should not feel pressured by societal norms or expectations. Encourage your son to focus on his passions and personal growth, and remind him that finding a romantic partner will come in due time.