Q: Are risks different for men vs women?
A: In heterosexual vaginal or anal sex, if other factors are equal, a woman has a biologically higher risk of infection compared to a man.
- The surface area of the vagina or anus is far greater than the surface area of the penis.
- The risks of tears to the vagina or anus during sex is greater as the these inner linings are more delicate than the skin on the penis.
- The length of time of exposure of the vagina or anus to semen is greater than the time the penis is exposed to the vaginal fluid or rectal mucosa.
Q: Are risks similar for insertive vs receptive anal sex?
A: The risk for anal sex, if other factors are equal, is greater for a receptive partner compared to an insertive partner.
- The surface area inside of the anus, is larger than the surface area of the penis
- The risks of tears to the anus during sex is greater as the membrane on the inside of the anus is more delicate than the skin on the penis
- Pre-cum and cum will stay in the receptive partner for longer than the insertive partner is in contact with rectal tissue and mucosa.
1 June 2016