Well, this isn't a, "How Do I Look?" question, but just by judging the profile pictures of people here and young women in real life. Late teens/early twenties - the women are usually so attractive.
Most Helpful Girl
That's usually a girls prime.0
Most Helpful Guy
Early-mid 20's is when women are most fertile and are in their best shape. Since by nature one of the main goals of humans is to reproduce, girls are most horny right before their period which is when they are most fertile. Men are most attracted to women when the woman is most fertile.0