[Wuerstchen]

About how far along into breast development do you have to be to achive nipple orgasm? Or is it something that varies significantly from person to person?

Others will have to answer that. I am sure that it must vary from person to person. I developed gynecomastia in my late teens and discovered at age 19 that I could have them--I had never imagined there was such a thing, but it felt wonderful and I kept rubbing my nipples and, bang, I experienced nipple orgasm.

But I know several guys who have never done NBE and don't have gyno who, through regular stimulation of the nipples, developed the capacity for nipple orgasm and now have them easily and in multiples.