I Want Really Big Boobs

Punishingly Large... I often have a perverse fantasy of growing breasts that would definitely be considered "too big". Whether it be through hormones, some sort of genetic incident, or surgery I would not mind if my boobs were punishingly large. What makes that so perverse? Well, imagine being trapped by them, sitting under their size and weight feeling completely helpless. I would absolutely love to be well endowed, not for the attention or seeking the envy of others, but just to have them.
I know, the back aches would be a problem, and after a while I would probably get tired of it, but fantasizing about it is just so much fun.