For Heterosexual Couples Who Practice Anal Intercourse, Which of the Following

For heterosexual couples who practice anal intercourse, which of the following recommendations would be MOST helpful?

A) If planning to have vaginal intercourse as well, do it before having anal intercourse.
B) Rapid penetration is likely to be most comfortable.
C) Because of the moist conditions within the rectum, additional lubrication is not required.
D) Contract the sphincter prior to penetration for ease of insertion.