Well it's just the opposite for me, but maybe I'm just the rare exception, dunno. I am the one leaving and my husband is still in. I'm working on him though but he is being as stubborn as any of the wife stories I've heard around here.
I think it maybe that most of the time the males start doing the investigating first because of the exposure to things they have when they hold higher responsibilities in the congregation along with the pressure they face by these responsibilities. It's my opinion that if the females were expected to take on the same kind of responsibilities as the men in the congregation, it would cause them to investigate into matters deeper and maybe even leave the borg sooner than their male counterparts. A Womans emotional side tends to make her want to investigate matters extensively so as to make sure her decision (IE like on a JC) is the correct one and not a decision that could bring danger, damage harm or pain to an individual. I'm not saying men don't do this, I'm only saying women tend to deal more on the emotional side of things than men.
In my case I had a reason to want to investigate things, I hated my life, I wanted a career and a family but I was sacrificing these things for the organization (for God I thought) and when I couldn't take anymore misery I just had to make sure without a doubt that sacrificing myself and my life in this way was the right thing to do. It was like finding the key to the prison door when I started investigating and reading everything online. The only thing I have to possibly lose is my husband because none of my immediate family
is a JW. Infact, since my becoming inactive I have been able to strengthen my family ties and we are closer than we have ever been before in our lives, especially my sister and I.
My husband on the other hand loves his life in the borg and has no reason to question it and infact would have a lot to lose because his whole family is a JW.