I noticed in the scene while reading it in game and also in the console to see exactly what interactions were happening that the handjob scene has an issue where the text meant to give variants related to ball size weren't proccing, instead skipping that section of code entirely.
Here's proof the game is skipping that section
if (pc.ballSize() < 8)
{
output("\n\nYour trembling [pc.ballsNoun] fill" + (pc.balls == 1 ? "s":"") + " her hand perfectly");
if (pc.ballSize() >= 6)
{
if(pc.balls > 1) output(", their extra-large sizes spilling between the gaps of her wily fingers");
else output(", its extra-large size spilling between the gaps of her wily fingers");
}
output(". With both hands she can easily cup " + (pc.balls == 1 ? "it":"them") + " in her dainty hands.");
}
else if(pc.ballSize() < 16)
{
output("\n\nYour massive sack is too much for Bianca to possessively cup, even with both hands. When she tries to take possession of your slippery " + (pc.balls > 1 ? "jewels, they spill" : "jewel, it spills") + " through the gaps of her fingers and envelope" + (pc.balls == 1 ? "s":"") + " her digits in copious nutflesh. Unclaimed seed splashes in her worshipful grip, actively brewing up a more filling load with each ecstatic contraction.");
}
Here's proof the game is skipping that section