Many, many years ago, I considered myself to be a bit of a crossdresser. A kinky guy who liked to wear bras and other things, very occasionally. There was a level of excitement attached to it all. This was before I realized that other things were going on. Again, years ago, I bought a couple of pairs of breast forms. The first ones were high quality triangle shaped forms with a concave back to allow for natural flesh, to suit D Cup bras in my band size. The other set were lower in quality but still decent enough, to suit my white Doreen 42G bra which I bought exclusively for fun at the same time.
That bra is built like a brick outhouse! It holds those heavy forms easily. So easily in fact that it is easy enough to forget that they are there, apart from what is seen in peripheral vision.
I don't play those games anymore. The fetish aspect is long gone. But I still have my Doreen, stowed in an archive box in my wardrobe. It is pointless (pardon the pun) trying to get one in my real size; it's not actually possible and it's not the day-to-day look I'm after anyway. Maybe I will bust (pun intended!) my old one out again one day, for old times' sake!