I'm extremely quiet and I'm 5.5" at best.
I'm kind of shower-not-grower though. Sometimes I like taking off my pants before a shower and pretending I have a huge dick because it's like 3 inches flaccid and looks like it must become a python when I get hard. Sometimes I'll think about tits for like five seconds just so it chubs up even more but still looks like a flaccid dick, and then I'll walk back and forth in front of the mirror like "oh, hey, didn't see you there" like I'm just casually naked and this is how my dick is all the time. Feels pretty good.
But yeah it's pretty average.