>>2101977above all else, it's the shape. giant boobs irl weigh themselves down and typically begin to sag much sooner than smaller breasts, and become proportionately "flatter," as they do so, while 2D boobs can remain round and full at all sizes; unless you're intodown-facing udders (which some people are; lets be fair) irl boobs are best cut off ~Gcups, or J at the most; imo at least.
