Aside from Reducto and Shouldra's powers, there are many items that might do that (whisker fruit, equinum, incubi draft, minotaur blood,...). Can't recall if golden seed, hummus, reptilum and trap oil are able to deduce breast size as well.
hi i used the hummus cheat to remove my breasts and found out a little to late that it messes with your stats and i've already saved over it is there any way to reverse the effect?