We have a total author crush on Mary Roach after reading her latest book, Bonk: The Curious Coupling of Science and Sex. (Perhaps she got sick of being asked if her best-selling book Stiff was about bonking. It's about death, if you've been living under a rock.) She's the kind of sex writer we'd like to be when we grow up: hilarious, smart, and completely acceptable on your grandmother's coffee table. There's a lot of dubious sex research out there--we're as guilty as the next sex blogger of disseminating it sometimes--and Roach waded knee-deep into it to find some real answers. (Actually, if you check out this video, she went way further than knee-deep.) Here are ten fun facts (yay facts!) she unearthed along the way...

10 Facts About Bonking from "Bonk"

1. The typical session of intercourse lasts from two to five minutes and consists, on the part of the man, of 100 to 500 thrusts.

3. Studies suggest that people who have regular orgasms live longer, have less stress and enjoy lower rates of heart disease, breast cancer, prostate cancer, and endometriosis.

4. Penises and clitorises aren't the only organs with erectile tissue. The reason your nose gets congested during a cold is that the nasal erectile tissue expands. Nasal congestion is an erection in your nose. (Hey, it's sexy when your genitals do it.)

5. Women, like men, get nocturnal erections (not the nasal variety).

6. Regularly spilling one's seed serves a valuable biological function.

7. It may comfort you to know that the autopsy data on fatal heart attacks during sex suggest that they are rare.  It may or may not comfort you to know that "in most cases sudden death occurred during the sexual act with a prostitute."

8. In 1989, a team of psychiatrists at SUNY Downstate Medical Center interviewed 21 men who said they regularly had multiple orgasms. Some had always been able, and some had developed the ability later in life.

9. The youngest instance of human masturbation is documented in "Sonographic Observation of In Utero Fetal 'Masturbation,'" a 1987 letter to the editor published in the Journal of Ultrasound Medicine. The accompanying images show a fetus, seven months old, caught in the act.

10. A 2002 Italian study found that absolutely everyone in a group of 44 men seeking surgical penis lengthening had organs well within the normal range  (from 1.6 to 4.7 inches, flaccid). The authors blamed abnormally endowed porn stars for the growing epidemic of penile insecurity.