I remember that study – subjects were asked to imagine warm water running over their breasts. This increased blood flow, which resulted in a slight increase in size, but the change was only transitory. After an hour or so, those slightly enhanced breasts went back to being the way they were before the imagery.
I would humbly suggest that, rather than putting time and energy into imagining bigger breasts, you might consider focusing on shifting your attitude, to perceiving your breasts as lovely and amazing, just the way they are. Truly, that’s time better spent. Embrace your breasts!
It troubles me the way women are pushed to think so negatively about their bodies these days. Too many young girls and women are hypercritical of their perfectly fine bodies, based on some lunatic standard of beauty that has very little to do with reality – not to mention that the styles and fads about what’s beautiful come and go anyway . Please don’t do that to yourself.
Meantime, the answer to your question, which is probably pretty obvious by now: no way will I make such imagery. Not gonna happen.
All best wishes to you and your perfectly fine breasts,