They both have expectations, high exepctations.
If their demands are not met they throw a fit until they get what they want.
How else can this be described?
'Childish' yes but that hardly fits with the analogy, how about 'High Maintenance'.
"Peter what should you do to solve the problem?"
Easy, avoid high maintenance girls/mocks.
Peters final thought: Don't completely close your mind to girls/mocks as they can be useful in the appropriate situation :o)