From here:

http://www.rccmsc.org/resources/get-the-facts.aspx

we have the following:

Age of sexual assault victims

* 15% are under age 12 * 29% are age 12-17 * 44% are under age 18 * 80% are under age 30 * Ages 12-34 are the years with the highest risk  * Girls ages 16-19 are four times more likely than the general population to be victims of sexual assault.

Now, if rape really was about power and not sex, shouldn't we expect 75 year old grannies with deflated funbags to be the primary targets? Your average granny doesn't exactly have the agility, flexibility, or strength to repel her assailant. These are the most defenseless kind of women imaginable, and yet are not a hot commodity among rapists. Why?