I wish I had learned how to have successful relationships with women in college, though of course college generally doesn't teach that unless certain classes in psychology and human sexuality offer some useful information. Because our culture leaves something this important to the haphazard, if you can't get the foundations for that man's skill set in high school, and if you go to college and can't get the right kind of "remediation" there, then as an adult you face some serious problems which extend to other areas of a man's life beyond just the impaired ability to pair up with women.