Everyday life has changed ever since new bugs replaced human men. Sex was seen as less taboo and women felt more comfortable with their sexuality. Due to this, mother-daughter bonding has gotten much more intimate (new bug world) (see comment for extras)
A milestone of followers? Painfully unfunny jokes about a certain un-named hormone regulation system? Chiaki getting some sort of comeuppance for it? All of the above!
I want to be this full of worms, stuffed to the point that they can't all fit in my womb, squirming inside me constantly as I go about my day [Lucylovecraft]