i think both are valid points
Some people will have small penis
Some women will have a stretched vagina.
Evidence goes both ways on it, fact some men will have a small penis. However a majority of women cant be fisted, do you think that the women who take a fist in the Vag are gonna feel an avg 6 inch cock in there the same way miss only has sex with her boyfriend after 8 months of dating. With her boyfriend who is avg size and she only fingers herself with 2 fingers once every tuesday night.
And sadly that wasnt a longer clip there is another part of the big vagina thign latter in the episode when a baseball is missing and so is larrys cellphone its a funny episode.