The penetration

A small article-definition of sexual penetration: What is the penetration when penetration, and the various existing forms of penetration ... and how to find the hole (the question that all beginners at their first time when they'll make love )

Penetration in sexual intercourse, is (usually) after the preliminary , it is when one partner enters the other. In the case of a heterosexual relationship is when the man puts his penis in the woman.
We talk about vaginal penetration when inserted into the vagina of women; of anal when it comes to enter through the anus of the partner in his rectum. Also known as sodomy .
Finally, more rarely, it is called penetration oral (or oral) when introduced into the mouth of the other ... but we talk often of fellatio.

Note that the penetration is not necessarily the penis: it can be done with fingers or with the language, or with accessories that can be many and varied: sex toys, made ​​for that, and other everyday objects that can fall under the hand (again, be careful not to use dangerous for you or your partner).

Movements back and forth from the penis of the man stimulate his penis, in women, the comings and goings of the penis (or object penetration) stimulates her vagina on the other hand, small lips and clitoris. In women, the pleasure is less "automatic" than in men: the pleasure she's feeling and intensity will depend on several factors, including the ability of partners (their ability to move and waving in rhythm to show steadfast in the effort, etc.)..

The comings and goings can (and should, as far as possible) accompanied by kisses, caresses the breasts, buttocks, clitoris, anus and other body parts, which contribute to the rise partners pleasure by stimulating the erogenous zones (sexual or otherwise).

Intercourse (another name for sex) can be done in various sexual positions.
The best known is the missionary position: the woman on her back, legs spread, the man on it. The choice of position depends on the anatomy, tastes, circumstances and fantasies of the partners, and generally, we change several times in the same position during intercourse, for a pleasant change and vary the areas stimulated and find one that provides the more fun to partners.

Finally, it should be emphasized that the penetration exposes partners to sexually transmitted diseases (STDs) and it is essential to use condoms if both partners have not been testing recently, to avoid risk of transmission (AIDS, but also any other STD). Refuse sexual intercourse with a casual partner (or untested) who refuses a condom, so does your life.