Expansion has always been something I've been interested in, just don't like to admit it ^ω^ I think it stems from my love of pregnancy (which is a form of expansion) and of course with pregnancy comes lactation, which in turn can be used in a form of expansion. I think for me milk expansion of the boobs or dock and ball expansion from over production would be my favorites :3

Would I like to see a YCH? Sure! Although you have peaked my interest so I wouldn't mind nabbing the YCH if I am able to afford