An orgasm prior to male ejaculation can help make the sex more pleasurable, the vagina more lubricated and make the whole scene much less clinical.
Some research has shown that an orgasm after male orgasm may help in the following way. When a woman has an orgasm her cervix, the mouth of the uterus, contracts as the uterus moves. This causes the uterus to dip or bob into the vagina. If the male has already had an orgasm, then this area is rich in semen (sperm). This motion of the cervix will actually draw the semen into the cervix and uterus to aid in it's passage towards the ripe egg.