As a crossdresser, I'm not "out" to my wife or family or good friends (but lots of strangers have seen me dressed or in mixed mode ).
But I have this yen to have "real" breasts -- that when I dress, that chest would be me. Not huge, but big enough to be sexy, such as a full B cup.
Of course my rational side tells me my wife would not be amused, and that it might be rather difficult to explain to my mother. Then there is the fact that I'm Not Cool with any kind of serious surgery; and that HRT has side effects such as sterility that I'm not comfortable with. So any substantial augmentation is not likely in the cards for me.
In the meantime, I fantasize about, "But what if you could have them -temporarily-, without important side effects?!"
So, supposing you could have real breasts temporarily from time to time -- would you, and for how long?
To keep it from being a La La Magic Land question: medically there is no practical way to distribute or redistribute tissue over a matter of hours. Flat to A-cup within (say) 2 weeks -might- be medically possible. At larger cup size, I doubt the change could be that rapid. We know, though, that a woman can go up about 2 cup sizes over roughly six months during pregnancy, and presumably the triggers for that could be found and probably accelerated a bit.
For example, my wife sometimes visits her parents for 10 days or 2 weeks. If I could put on (and mostly take off) even just half a cup during that time, without important side effects, I probably would. (Heck, I could possibly get away with going to AA cup -- I've had a bit of growth as it is, without any deliberate action.)
Okay, what was the question again?