1.   What primal urge makes these men want to ride the bull?

2.   Both are rooted in primal urges or, to use a food term, appetites.

3.   But it was only humanity on the threshold of a new age, exercising its primal urge to celebrate.

4.   I suddenly understood the primal urge that has gripped women since the time of Cleopatra, who ordered up skin-soothing baths of milk and honey.

5.   It knows those things are the phony accoutrements of civilization, elaborate charades designed to disguise our primal urge to kill as socially palatable pastimes.

6.   Nothing stands before her primal urge to clean everything in sight.

7.   Pheromones are the mysterious fragrances that govern the primal urge to court and mate in creatures from moths to mice.

8.   Pacifiers capitalize on the primal urge to suckle.

9.   So Bill Clinton and his misdeeds collide head-on with the primal urge to teach my son, to nurture and protect him.

10.   The gurgling sound not only softens city noises but probably fulfills some primal urge.