History of sexual violence is a contributing factor for sexual desire disorders.

In areas of the United States where gay marriage is illegal, many gays are entering into

A) polyandry. B) group marriages. C) nonhomogamous states. D) civil unions.

There are many jokes out there about the advantage that having opposable thumbs gives human beings over most animals. As your authors note, however, it is not until the age of ____ that children actually start to use their thumbs as part of the grasping process!

a. 3–4 months b. 5–6 months c. 7–8 months d. 9–10 months