when do girls stop giggling? i think it's a perceived sign of maturity. immature girls giggle. mature girls don't. case in point: can u see lynnchen giggling much as a high schooler? don't think so. and girls who are "immature" tend to whisper alot. or maybe it's just a girl thing. to go into corners and whisper. for middle school females, everything is a big secret. "shhh, come here! i think we're having hot dogs for lunch today! shhhhh!" someone explain the giggling and whispering thing to me. actually, i got the whispering thing. someone explain the giggling. do 20+ year old girls still giggle? or is that too immature? what takes the place of giggling?