A Riddle (or two) a Month

Question: Why Does Big Tobacco Put Ammonia in Their Cigarettes?

Answer- So They Can Mop The Floor With Teens

Also, because ammonia helps to addict smokers more quickly.

Question: How are a cigarette and a fire hydrant alike? 

Answer- They both are full of Urea (a component of dog urine and a flavor enhancer for cigarettes)