Absolutely, a straight man can be a feminist. Feminism is about believing in and advocating for equality of the sexes, which is not limited to any gender or sexual orientation. In fact, many straight men identify as feminists and actively support women's rights. It's crucial to remember that feminism isn't about being against men, but about challenging the systemic inequalities women face. Therefore, anyone can be a feminist as long as they believe in and fight for gender equality.