*gronk* Still not fully awake, but I'll give it a shot.
From personal experience, I had a gf back in my early 20's (she was a year older than I) who went on the BC pill. She eventually grew from a C to a D-cup. I tended to fondle/squeeze her boobs a lot (was the first busty gf I had, so quite novel to me). One of the squeezing motions I would do was from base towards nipple. One day a wee bit of a clear/cloudy fluid oozed out. I was neither a huge fan of lactation, but it didn't creep me out. It was just 'interesting'.
Not long after that, she was at work and started leaking. Possibly let-down reflex from hearing someone else's baby cry... I don't recall. She had to dash off to the washroom and do her best to clean up and leave wads of tissue paper in her bra. When she finally got home to tell me, she was *not* amused. I think I was, although naturally I didn't display that, for fear of finding out exactly how unamused she was.
Having said that, there seems to be a proper methodology for inducing lactation, full and strong. Not just pumping, but a woman can get the appropriate hormone therapy from her doctor.
I've exchanged e-mails with a woman in the past (and I know I've seen her in the BEA chat room once) who gave me details about her experience (inspired by her bf). It was all about the right time, right place.
I don't know how often she reads this forum, but I think to divulge much more than I already have, would be to breach confidence. Not to mention I'd have to go dig up a number of e-mails and summarize (and risk losing something in the translation).
If I have time this weekend, I'll see about dropping her an e-mail, asking her to reply to this thread.