11.   Who could possibly resist a weekly series about the mating habits of a dysfunctional family of web-footed aquatic mammals?

12.   After collecting water striders in North America and Europe, the researchers examined them and then observed their mating habits.

13.   Buss, who has written two books on human mating habits, said the female preference for taller males harkens back to the earliest stages of human evolution.

14.   But their mating habits differ in other ways.