I'm sure there are a number of reasons. For my money, I don't think women like to collect things as much as men do. What's the first thing your wife says when you bring something home? "Where are you going to put that?"
Lack of Female Representation
So who can explain the near lack of females in our hobby? There are far more women discussing football than audio, by a long shot. There are a lot more women into fixing up their cars as well. I just can’t think of a hobby, other than ours, where representation is so close to zero.