This is fascinating reading for me, because what I am biologically, I am growing my own breasts without estrogen. Size wise I am between an A cup and a b Cup, or if we measure in fruits, a normal sized orange or an apple. And surprise, surprise, my left boob is larger than my right side one. The difference is clearly visible!
I do not have any tenderness in my nipples (but definitely can feel sexual stimulation), so, no hurting but good feelings. This might be because the girls are growing naturally and slower? My problem are erect nipples for 24/7, no matter whether it is cold or hot, or what kind of thoughts are going through my head, those guys are erect. This is a little bothersome, because they get almost sour rubbing against fabric the entire day long.
I wonder what will happen to my breast growth once I am on hormones by the en of the year! I don't want to have real big breasts, and I hope they stay in a pleasant size limit!