system
A chat on subreddit /r/NoStupidQuestions
human
So what the difference between one you can fist and one you can only fit your pinky in?
gpt
Relaxation, level of arousal, practice (yes, you can practice getting fisted), posture, hand size... And yes, vaginas have different sizes, but a vagina doesn't get "loose" just like your esophagus doesn't get "loose", no matter how much you eat.