Three Questions

Three questions I have not been able to find the answer to, no matter who I called (Cecil Adams, Glad You Asked, etc.):

First: Is there another species on Earth in which two females will fight over a male?
Too many bar fights, etc. I don't like to get near two women fighting.

Second: I know that men and women vary equally in heights. I just wonder if my observation is true, that women's heights are more spread out along the range while men's heights tend to cluster around the norm. I have noticed more instances of Allison Janney and Kristen Chinoweth than I have of Shaquille O'Neal and Muggsy Bogues. Do the average group of women vary in tallness more than the average group of men do?

Third: What universe do professors at Business Schools inhabit? They teach that companies can increase sales by throwing thousands of customers out of work, that they can attract more customers by cutting back on customer service, and that you don't have to show loyalty to your workers to get them to show loyalty to your company. I mean, what have they been smoking?

Back to serious stuff later, but I am curious about these.