Answer:
What word is a plural, but when you add an "S" to the end, it becomes singular?
A man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?
What has two legs but doesn't walk?
What kinds of men are always above board?
Stealthy as a shadow in the dead of night, cunning but affectionate if given a bite. Never owned but often loved. At my sport considered cruel, but that's because you never know me at all.
What is the middle of water but is not an island?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?