No, I'm not a member. Can't say I've ever come close. Not even first base. The closest I've ever come was, while sitting in a bulkhead seat with the flight attendant in a jump seat across from me, hearing her stories of people she'd caught while joining. She informed my seatmate and I that it was illegal (apparently it's not) and you can get in quite a bit of trouble if caught (you can).
This isn't the kind of thing I normally spend time thinking about, but this morning I saw this article. In addition, my best friend is, at the moment I'm writing, somewhere over the North Pole on his way back from Hong Kong. As a result, the concept piqued my interest.
Aside from my wife, I can't say I've ever been remotely interested in any of my seatmates.
I've had plenty of good (and bad) interactions with women on a plane. I had a woman yell at me for wearing a Fox News shirt (I used to work there). I calmly explained to her that it's based in New York, so it's chock full of Democrats, which got a smattering of applause. I helped a girl returning from college, who'd never flown before, find her luggage and reunite with her family. I also had a very cute woman grab my arm, to the point of pain, as she chanted something in Spanish and grasped her Bible during takeoff. I'm guessing she was saying the Hail Mary, but I'll never know. I didn't feel like I should pry her loose, her fear was palpable and the flight was a red-eye. I just wanted her to calm down so I could go to sleep.