The early chapters of Proverbs have several admonitions addressed to a son but they are not gender-specific. Yes, it sure seems like it but they were written during ancient times. Women did not have the place they have now in most societies. 

Many admonitions also focus on the dangers of immoral women, which sounds hypocritical coming from King Solomon who had a thousand wives and concubines. But figurative language is used a lot to emphasize a point, even overstating it.