That is really the outcome of the first 2. When you dont have a sense of identity as you grow up, you tend to try and find something special or unique to make it your identity that makes you feel special. Some people might take up hobbies. Some people will aim for high achievements. Some go in the service of others. Some put tattoos and pretend to be bad ass. Some use their gender / sexual identity to make themselves feel special. Marxists have perfected the methods to exploit the last group.