Anal sex is the practice of inserting the penis, fingers, or a foreign object such as a vibrator into the anus for sexual pleasure. With the. When a woman is aroused, the vagina provides its own lubricant for sex. The anus, however, does not. That means you have to provide it. For women, a positive response to the question, “Have you ever had anal sex? ( the contact of a man's penis with your anus or butt)” defined.