Regarding the Human Sexual Response and Sexual Compatibility, Which of the Following

Regarding the human sexual response and sexual compatibility, which of the following statements is FALSE?

A) There is no relationship between penis size and male sexual potency.
B) Reaching sexual climax at the same time should be the goal of a couple's lovemaking.
C) Only five percent of males are capable of multiple orgasm and are limited to only a second one following an unavoidable refractory period.
D) A woman's vagina adjusts to the size of the penis with her subjective feelings of pleasure and intensity of orgasm not related to penis size.