My pet foot is my left foot, 
I keep it close to me, 
Closer than a beekeeper keeps his bees. 
I kick it with my right foot when it steps out of line. 
My right foot is a lemon but my pet foot's a lime. 
I could tell you about my pet foot, it tends to make me leave my shoes and socks rolled up and stashed behind your couch. 
I could tell you more but I do believe I've got my pet foot stuck in my mouth.