Depends on how fast he runs in a sitting. If he runs slow during the 20 minutes he isn't getting much done :D.
C. Sensitivity
because this isn't a constant thing, so it isn't a. it isn't b. and it isn't d.
Answer: During sexual intercouarse a males ejaculation fertilizes the egg and is released. Once the egg travles to the uterus. It will usually implant in endometrium. From there a hormone called human chorionic gonadotropin begins to produce in the uturus. This is the hormone that a pregnancy test measures. It prevents the uterine lining from being shed, so the woman does not have a period. Resulting in pregnancy.
