Teenage Boys and Sex: WTF?

I have just started reading a completely ludicrous book titled "Why Gender Matters" by Leonard Sax. I have read one chapter only and have based my assessment of the book on this one chapter (chapter 6: Sex), indeed on one passage:

"The motivation for sex is fundamentally different for most teenage boys compared with teenage girls. Teenage boys want to have sex to satisfy sexual desire. It's a gut-level, base-of-the-brain impulse, not far removed from the need to have a bowel movement when you feel the urge." (Page 125)

Ah, sex and poo, quite the erotic combination - thankfully (especially for teenage boys, or so it would seem), there's a whole subsection of porn devoted to fecal lust. (OK, I'm done now).

Also, on behalf of my teenage sisters, I would like to point out that the having of sexual desire - and the wanting to satisfy sexual desire as a motivation for sex - is very much a part of we XX humans. It is completely healthy and normal to be interested in sex while being female. AND, as proof of the link between being imbued with lust and (mostly) imbued with estrogen, astute readers will notice that I, a womb-bearing member of humanity, opened the ludicrous book at the chapter on Sex. Baby!