Back in the day I knew a girl who had superb (and large) boobs, being perfect in size form and firmness. She also happened to be a page three model when page three model meant something and to add to that, she was bi` much to my wife's delight !. She was convinced the reason she had big boobs was to do with the fact she had been performing blow jobs since the age of thirteen and all the cum she had swallowed over the years had influenced her cup size. There was no medical evidence to support such a contention, but she believed it and who was going to discourage her thinking on the matter, certainly not me !.....Well, there you go, a totally factual story for your delectation and contemplation.