For the past few months, I have been living with a cat for the first time in my life. His name is Sasha and he belongs to my roommate Maria. Based on my recent observations on feline behavior, I have discovered that, unlike pirates, cats and ninjas have a lot in common. Ninjas are silent. Ninjas lurk undetected. Sasha is also silent and tends to lurk at my feet, undetected until trod upon. Ninjas are deadly. Sasha has killed one small bird and one baby mouse. However, ninjas don't pee in gym bags. Update! Sasha strikes again.