Before having sex a man and woman must both be willing and receptive. The way you prepare each other for sex is through foreplay. Foreplay is crucial, because it arouses the woman so she'll produce more lubrication and will relax her vaginal muscles to make sex easier and more enjoyable. Foreplay can be anything you do to sexually arouse the other, excluding sexual intercourse. Kissing, hugging, whispering, massaging, undressing, caressing, rubbing, tickling, rolling around together, dancing for each other, running your fingers through each other's hair... These are all forms of foreplay. You can use many parts of your body all at once to stimulate your partner, including your hands, fingers, tongue, eyelashes, voice, lips, breath, thigh, butt, hair, etc. Areas to target could be absolutely anywhere on the surface of the body. Once the male is turned on by the female or by his own imagination, his penis will automatically begin to stiffen toward an erection. This shouldn't be a surprise to anyone. At this time, often before the man is aware, a drop of fluid called the pre-ejaculate commonly escapes from the tip of the penis. If he has recently ejaculated this drop can contain thousands of sperm capable of fertilizing an egg. So you should keep your penis away from the vagina at this point until a condom has been placed over it.