For heterosexual couples, pregnancy can occur if semen is deposited near the opening to the vagina. For the giving partner, the anus may provide a pleasing tightness around the penis. So Pathela and colleagues first asked the men if they were bisexual, gay, or straight. This might comfort some of the straight men who write you and say they enjoy anal stimulation. I think they feel pressured to engage in anal sex, especially if they view pornography. Continued Anal sex can carry other risks as well. This content has not been reviewed within the past year and may not represent WebMD's most up-to-date information.