" A girl has shorter vocal cords than a boy, so it actually takes less effort for her to talk. As for boys‚ their vocal cords double in length during puberty. This can make it a lot of work for them to spit something out! Guys are four times more likely than girls to have a stuttering problem. So, because many boys aren’t as good at talking as girls, they do less of it. "

― , The Big Book of Girl Stuff