Makes girls sprout boobies like raspberries! To trigger, use add r4spb3rr13s to the prompt with a weight of 1 to 1.5. Adding the term extra breasts can sometimes help. For img2img, I found a lyco weight of 0.6-1 works well. With v1 it may be difficult to control the amounts of breasts (influencing with weight of r4spb3rr13s and extra breasts) and you may have to do some "berry" picking 😜.

Parameters (influences results, but not guaranteed):

nolimbs: a head with only breasts

chestberries: breasts on chest/front only

huge breasts: bigger boobs

enormous breasts: succesful use results in a large blob of boobs

r4sp1x, r4sp2x, r4sp3x, r4sp4x: amount of breasts, though I couldn't get these to work reliably. Feel free to try, ymmv.

Big thanks to moreflame for requesting this and providing training data!